Update app.py

app.py

@@ -284,7 +284,9 @@ suggestion = [
 
 def respond(message, chat_history):
     response = generate_text(message)
-    chat_history.append((message,response+"."))
+    #chat_history.append((message,response+"."))
+    chat_history.append((message, None ))
+    chat_history.append((None, response))
     return "",chat_history
 
 def suggestion1(chat_history):