Update app.py

app.py

@@ -29,7 +29,7 @@ class Conversation:
         self.messages.append({"role": "assistant", "content": message})
 
         if len(self.messages) > self.num_of_round*2 + 1:
-            del self.messages[1:3] //Remove the first round conversation left.
+            del self.messages[1:3] # Remove the first round conversation left.
         return message