You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Catherine Parker. I want to cancel my recent reservation due to my graduation examinations. Can you please help me in this issue?

ASSISTANT: Please wait a while. Sorry to say, there is no reservation on your name in our database.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for opting us.