diff --git a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs
index 5a291e8f..482857d9 100644
--- a/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs
+++ b/src/Infrastructure/BotSharp.Core/Conversations/Services/ConversationService.SendMessage.cs
@@ -106,7 +106,6 @@ public partial class ConversationService
         message.RichContent = message.RichContent ?? new RichContent<TextMessage>
         {
             Recipient = new Recipient { Id = state.GetConversationId() },
-            MessageingType = "RESPONSE",
             Message = new TextMessage { Text = message.Content }
         };