Update app.py

app.py

@@ -32,7 +32,7 @@ def main():
     # If the user's message is not empty, process it
     if user_message:
         # Add user's message to conversation history
-        conversation_history.append((user_message))
+        conversation_history.append(("user", user_message))
 
         # Combine conversation history to use as input for the AI assistant
         conversation_input = "\n".join([f"{author}: {message}" for author, message in conversation_history])