Update app.py

app.py

@@ -37,7 +37,7 @@ async def main():
             text = event.raw_text
 
             # Personal message
-            if chat_id == sender_id:
+            if chat_id == sender_id and not sender.bot:
                 # Check the last reply to this sender
                 last_reply_time = reply_times.get(str(sender_id), None)
                 if last_reply_time is None or time.time() - last_reply_time > 60*60*6:  # reply only if not replied in the last minute