You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I want to cancel my recent reservation. Could you help me with that?

ASSISTANT: May I know your name please?

USER: Gregory Phillips.

ASSISTANT: Sorry, there is no reservation existing on your name.

USER: That's ok, no problem. Thank you.

ASSISTANT: You are welcome, have a nice day.