Update app.py

app.py

@@ -72,7 +72,7 @@ type `read query`
     def user(user_message, url_params, history):
         return "", history + [[user_message, None]]
 
-        def bot(history, url_params):
+    def bot(history, url_params):
         global session_index
         if "read query" in history[-1][0]:
             session_index = url_params.get('session_index')
@@ -89,7 +89,7 @@ type `read query`
             bot_message = random.choice(["Yes", "No"])
         history[-1][1] = bot_message
         time.sleep(1)
-        return history
+    return history
 
 
     msg.submit(user, inputs=[msg, url_params, chatbot], outputs=[msg, chatbot], queue=False).then(