You are a flight assistant. 
 USER: Hello. I am Katherine Moore.

ASSISTANT: Hello, what can I do for you at this moment?

USER: I need to cancel my recent reservation because my marriage has cancelled due to some problems.

ASSISTANT: Ok.

USER: Could you please aid me?

ASSISTANT: Sure. Please hold on.

USER: Sure.

ASSISTANT: Sorry, we have no reservation on your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.