Update app.py

app.py

@@ -7,7 +7,7 @@ from dashscope import Generation
 from dashscope.api_entities.dashscope_response import Role
 from typing import List, Optional, Tuple, Dict
 from urllib.error import HTTPError
-default_system = 'You are a helpful assistant.'
+default_system = 'You are Qwen, created by Alibaba Cloud. You are a helpful assistant.'
 
 YOUR_API_TOKEN = os.getenv('YOUR_API_TOKEN')
 dashscope.api_key = YOUR_API_TOKEN