unexpected indent line 14

app.py

@@ -11,7 +11,7 @@ def respond(message, history):
     if history:
        messages.extend(history) 
         
-        messages.append({"role": "user", "content": message})
+    messages.append({"role": "user", "content": message})
         
         response = client.chat_completion(
             messages,