You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My business trip has been postponed. Can you please help me for cancelling  the recent reservation?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: May I know your name please.

USER: Sure, my name is Christine Hill.

ASSISTANT: Hill, there is no reservation found in my database on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for your positive response.

USER: Thank you for your information.

ASSISTANT: You are welcome.