diff --git a/FunctionalTests/Skills/DialogToDialog/DialogRootBot/Dialogs/MainDialog.cs b/FunctionalTests/Skills/DialogToDialog/DialogRootBot/Dialogs/MainDialog.cs
index 04cdcad493..bd6445b54b 100644
--- a/FunctionalTests/Skills/DialogToDialog/DialogRootBot/Dialogs/MainDialog.cs
+++ b/FunctionalTests/Skills/DialogToDialog/DialogRootBot/Dialogs/MainDialog.cs
@@ -178,7 +178,7 @@ private async Task<DialogTurnResult> CallSkillActionStepAsync(WaterfallStepConte
             skillDialogArgs.Activity.Properties = stepContext.Context.Activity.Properties;
 
             // Comment or uncomment this line if you need to enable or disabled buffered replies.
-            skillDialogArgs.Activity.DeliveryMode = DeliveryModes.BufferedReplies;
+            skillDialogArgs.Activity.DeliveryMode = DeliveryModes.ExpectReplies;
 
             // Save active skill in state
             await _activeSkillProperty.SetAsync(stepContext.Context, selectedSkill, cancellationToken);
diff --git a/libraries/Microsoft.Bot.Builder.Dialogs/SkillDialog.cs b/libraries/Microsoft.Bot.Builder.Dialogs/SkillDialog.cs
index 2503c17345..adff6d2061 100644
--- a/libraries/Microsoft.Bot.Builder.Dialogs/SkillDialog.cs
+++ b/libraries/Microsoft.Bot.Builder.Dialogs/SkillDialog.cs
@@ -168,7 +168,7 @@ private async Task<Activity> SendToSkillAsync(ITurnContext context, Activity act
             var skillInfo = DialogOptions.Skill;
             await DialogOptions.ConversationState.SaveChangesAsync(context, true, cancellationToken).ConfigureAwait(false);
 
-            var response = await DialogOptions.SkillClient.PostActivityAsync<Activity[]>(DialogOptions.BotId, skillInfo.AppId, skillInfo.SkillEndpoint, DialogOptions.SkillHostEndpoint, skillConversationId, activity, cancellationToken).ConfigureAwait(false);
+            var response = await DialogOptions.SkillClient.PostActivityAsync<ExpectedReplies>(DialogOptions.BotId, skillInfo.AppId, skillInfo.SkillEndpoint, DialogOptions.SkillHostEndpoint, skillConversationId, activity, cancellationToken).ConfigureAwait(false);
 
             // Inspect the skill response status
             if (!(response.Status >= 200 && response.Status <= 299))
@@ -177,10 +177,10 @@ private async Task<Activity> SendToSkillAsync(ITurnContext context, Activity act
             }
 
             Activity eocActivity = null;
-            if (activity.DeliveryMode == DeliveryModes.BufferedReplies && response.Body.Any())
+            if (activity.DeliveryMode == DeliveryModes.ExpectReplies && response.Body.Activities != null && response.Body.Activities.Any())
             {
                 // Process replies in the response.Body.
-                foreach (var fromSkillActivity in response.Body)
+                foreach (var fromSkillActivity in response.Body.Activities)
                 {
                     if (fromSkillActivity.Type == ActivityTypes.EndOfConversation)
                     {
diff --git a/libraries/Microsoft.Bot.Builder/BotFrameworkAdapter.cs b/libraries/Microsoft.Bot.Builder/BotFrameworkAdapter.cs
index 0d84bba773..801fd58477 100644
--- a/libraries/Microsoft.Bot.Builder/BotFrameworkAdapter.cs
+++ b/libraries/Microsoft.Bot.Builder/BotFrameworkAdapter.cs
@@ -456,9 +456,9 @@ public override async Task<InvokeResponse> ProcessActivityAsync(ClaimsIdentity c
 
                     return (InvokeResponse)activityInvokeResponse.Value;
                 }
-                else if (context.Activity.DeliveryMode == DeliveryModes.BufferedReplies)
+                else if (context.Activity.DeliveryMode == DeliveryModes.ExpectReplies)
                 {
-                    return new InvokeResponse { Status = (int)HttpStatusCode.OK, Body = context.BufferedReplies };
+                    return new InvokeResponse { Status = (int)HttpStatusCode.OK, Body = new ExpectedReplies(context.BufferedReplyActivities) };
                 }
 
                 // For all non-invoke scenarios, the HTTP layers above don't have to mess
diff --git a/libraries/Microsoft.Bot.Builder/TurnContext.cs b/libraries/Microsoft.Bot.Builder/TurnContext.cs
index 1d53b5497b..c1e0baefb3 100644
--- a/libraries/Microsoft.Bot.Builder/TurnContext.cs
+++ b/libraries/Microsoft.Bot.Builder/TurnContext.cs
@@ -70,10 +70,10 @@ public bool Responded
         }
 
         /// <summary>
-        /// Gets a list of activities to send when `context.Activity.DeliveryMode == 'bufferedReplies'`.
+        /// Gets a list of activities to send when `context.Activity.DeliveryMode == 'expectReplies'.
         /// </summary>
         /// <value>A list of activities.</value></placeholder>
-        public List<Activity> BufferedReplies { get; } = new List<Activity>();
+        public List<Activity> BufferedReplyActivities { get; } = new List<Activity>();
 
         /// <summary>
         /// Adds a response handler for send activity operations.
@@ -267,7 +267,7 @@ Task<ResourceResponse[]> SendActivitiesThroughCallbackPipeline(int nextCallbackI
 
             async Task<ResourceResponse[]> SendActivitiesThroughAdapter()
             {
-                if (Activity.DeliveryMode == DeliveryModes.BufferedReplies)
+                if (Activity.DeliveryMode == DeliveryModes.ExpectReplies)
                 {
                     var responses = new ResourceResponse[bufferedActivities.Count];
                     var sentNonTraceActivity = false;
@@ -275,7 +275,7 @@ async Task<ResourceResponse[]> SendActivitiesThroughAdapter()
                     for (var index = 0; index < responses.Length; index++)
                     {
                         var activity = bufferedActivities[index];
-                        BufferedReplies.Add(activity);
+                        BufferedReplyActivities.Add(activity);
                         responses[index] = new ResourceResponse();
 
                         sentNonTraceActivity |= activity.Type != ActivityTypes.Trace;
diff --git a/libraries/Microsoft.Bot.Schema/DeliveryModes.cs b/libraries/Microsoft.Bot.Schema/DeliveryModes.cs
index 895b57fe1b..f511e4cf38 100644
--- a/libraries/Microsoft.Bot.Schema/DeliveryModes.cs
+++ b/libraries/Microsoft.Bot.Schema/DeliveryModes.cs
@@ -18,6 +18,6 @@ public static class DeliveryModes
     {
         public const string Normal = "normal";
         public const string Notification = "notification";
-        public const string BufferedReplies = "bufferedReplies";
+        public const string ExpectReplies = "expectReplies";
     }
 }
diff --git a/libraries/Microsoft.Bot.Schema/ExpectedReplies.cs b/libraries/Microsoft.Bot.Schema/ExpectedReplies.cs
new file mode 100644
index 0000000000..0bd93d0ca6
--- /dev/null
+++ b/libraries/Microsoft.Bot.Schema/ExpectedReplies.cs
@@ -0,0 +1,53 @@
+// <auto-generated>
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for
+// license information.
+//
+// Code generated by Microsoft (R) AutoRest Code Generator.
+// Changes may cause incorrect behavior and will be lost if the code is
+// regenerated.
+// </auto-generated>
+
+namespace Microsoft.Bot.Schema
+{
+    using Newtonsoft.Json;
+    using System.Collections.Generic;
+
+    /// <summary>
+    /// Replies in response to <see cref="DeliveryModes.ExpectReplies"/>
+    /// </summary>
+    public partial class ExpectedReplies
+    {
+        /// <summary>
+        /// Initializes a new instance of the ExpectedReplies class.
+        /// </summary>
+        public ExpectedReplies()
+        {
+            CustomInit();
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the ExpectedReplies class.
+        /// </summary>
+        /// <param name="activities">A collection of Activities that conforms
+        /// to the ExpectedReplies schema.</param>
+        public ExpectedReplies(IList<Activity> activities = default(IList<Activity>))
+        {
+            Activities = activities;
+            CustomInit();
+        }
+
+        /// <summary>
+        /// An initialization method that performs custom operations like setting defaults
+        /// </summary>
+        partial void CustomInit();
+
+        /// <summary>
+        /// Gets or sets a collection of Activities that conforms to the
+        /// ExpectedReplies schema.
+        /// </summary>
+        [JsonProperty(PropertyName = "activities")]
+        public IList<Activity> Activities { get; set; }
+
+    }
+}
diff --git a/tests/Microsoft.Bot.Builder.Dialogs.Tests/SkillDialogTests.cs b/tests/Microsoft.Bot.Builder.Dialogs.Tests/SkillDialogTests.cs
index 3200cbe8bc..8d848e5cb7 100644
--- a/tests/Microsoft.Bot.Builder.Dialogs.Tests/SkillDialogTests.cs
+++ b/tests/Microsoft.Bot.Builder.Dialogs.Tests/SkillDialogTests.cs
@@ -160,15 +160,15 @@ private static Mock<BotFrameworkClient> CreateMockSkillClient(Action<string, str
             if (captureAction != null)
             {
                 mockSkillClient
-                    .Setup(x => x.PostActivityAsync<Activity[]>(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<Uri>(), It.IsAny<Uri>(), It.IsAny<string>(), It.IsAny<Activity>(), It.IsAny<CancellationToken>()))
-                    .Returns(Task.FromResult(new InvokeResponse<Activity[]> { Status = returnStatus }))
+                    .Setup(x => x.PostActivityAsync<ExpectedReplies>(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<Uri>(), It.IsAny<Uri>(), It.IsAny<string>(), It.IsAny<Activity>(), It.IsAny<CancellationToken>()))
+                    .Returns(Task.FromResult(new InvokeResponse<ExpectedReplies> { Status = returnStatus }))
                     .Callback(captureAction);
             }
             else
             {
                 mockSkillClient
-                    .Setup(x => x.PostActivityAsync<Activity[]>(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<Uri>(), It.IsAny<Uri>(), It.IsAny<string>(), It.IsAny<Activity>(), It.IsAny<CancellationToken>()))
-                    .Returns(Task.FromResult(new InvokeResponse<Activity[]> { Status = returnStatus }));
+                    .Setup(x => x.PostActivityAsync<ExpectedReplies>(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<Uri>(), It.IsAny<Uri>(), It.IsAny<string>(), It.IsAny<Activity>(), It.IsAny<CancellationToken>()))
+                    .Returns(Task.FromResult(new InvokeResponse<ExpectedReplies> { Status = returnStatus }));
             }
 
             return mockSkillClient;
diff --git a/tests/Microsoft.Bot.Builder.Tests/BotFrameworkAdapterTests.cs b/tests/Microsoft.Bot.Builder.Tests/BotFrameworkAdapterTests.cs
index 32ce459a09..35288dae9e 100644
--- a/tests/Microsoft.Bot.Builder.Tests/BotFrameworkAdapterTests.cs
+++ b/tests/Microsoft.Bot.Builder.Tests/BotFrameworkAdapterTests.cs
@@ -358,7 +358,7 @@ public async Task ContinueConversationAsyncWithAudience()
         }
 
         [TestMethod]
-        public async Task DeliveryModeBufferedReplies()
+        public async Task DeliveryModeExpectReplies()
         {
             var mockCredentialProvider = new Mock<ICredentialProvider>();
             var mockHttpMessageHandler = new Mock<HttpMessageHandler>();
@@ -381,14 +381,14 @@ public async Task DeliveryModeBufferedReplies()
                 Type = ActivityTypes.Message,
                 ChannelId = Channels.Emulator,
                 ServiceUrl = "http://tempuri.org/whatever",
-                DeliveryMode = DeliveryModes.BufferedReplies,
+                DeliveryMode = DeliveryModes.ExpectReplies,
                 Text = "hello world"
             };
 
             var invokeResponse = await adapter.ProcessActivityAsync(string.Empty, inboundActivity, callback, CancellationToken.None);
 
             Assert.AreEqual((int)HttpStatusCode.OK, invokeResponse.Status);
-            var activities = (List<Activity>)invokeResponse.Body;
+            var activities = ((ExpectedReplies)invokeResponse.Body).Activities;
             Assert.AreEqual(3, activities.Count);
             Assert.AreEqual("activity 1", activities[0].Text);
             Assert.AreEqual("activity 2", activities[1].Text);
diff --git a/tests/Skills/Parent/ParentBot.cs b/tests/Skills/Parent/ParentBot.cs
index 0035330c7e..80631a45e1 100644
--- a/tests/Skills/Parent/ParentBot.cs
+++ b/tests/Skills/Parent/ParentBot.cs
@@ -76,8 +76,8 @@ protected override async Task OnMessageActivityAsync(ITurnContext<IMessageActivi
                     // incoming activity needs to be cloned for buffered replies
                     var cloneActivity = MessageFactory.Text(turnContext.Activity.Text);
                     cloneActivity.ApplyConversationReference(turnContext.Activity.GetConversationReference(), true);
-                    cloneActivity.DeliveryMode = DeliveryModes.BufferedReplies;
-                    var response1 = await _client.PostActivityAsync<Activity[]>(
+                    cloneActivity.DeliveryMode = DeliveryModes.ExpectReplies;
+                    var response1 = await _client.PostActivityAsync<ExpectedReplies>(
                         _fromBotId,
                         _toBotId,
                         new Uri("http://localhost:2303/api/messages"),
@@ -86,11 +86,12 @@ protected override async Task OnMessageActivityAsync(ITurnContext<IMessageActivi
                         cloneActivity,
                         cancellationToken);
 
-                    if (response1.Status == (int)HttpStatusCode.OK)
+                    if (response1.Status == (int)HttpStatusCode.OK && response1.Body?.Activities != null)
                     {
-                        if (!(await InterceptOAuthCards(response1.Body, turnContext, cancellationToken)))
+                        var activities = response1.Body.Activities.ToArray();
+                        if (!(await InterceptOAuthCards(activities, turnContext, cancellationToken)))
                         {
-                            await turnContext.SendActivitiesAsync(response1.Body, cancellationToken);
+                            await turnContext.SendActivitiesAsync(activities, cancellationToken);
                         }
                     }
                 }
@@ -102,9 +103,9 @@ protected override async Task OnMessageActivityAsync(ITurnContext<IMessageActivi
 
             var activity = MessageFactory.Text("parent to child");
             activity.ApplyConversationReference(turnContext.Activity.GetConversationReference(), true);
-            activity.DeliveryMode = DeliveryModes.BufferedReplies;
+            activity.DeliveryMode = DeliveryModes.ExpectReplies;
 
-            var response = await _client.PostActivityAsync<Activity[]>(
+            var response = await _client.PostActivityAsync<ExpectedReplies>(
                 _fromBotId,
                 _toBotId,
                 new Uri("http://localhost:2303/api/messages"),
@@ -115,7 +116,7 @@ protected override async Task OnMessageActivityAsync(ITurnContext<IMessageActivi
 
             if (response.Status == (int)HttpStatusCode.OK)
             {
-                await turnContext.SendActivitiesAsync(response.Body, cancellationToken);
+                await turnContext.SendActivitiesAsync(response.Body?.Activities?.ToArray(), cancellationToken);
             }
 
             await turnContext.SendActivityAsync(MessageFactory.Text("parent: after child"), cancellationToken);