You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need your help in cancelling my recent reservation.

ASSISTANT: Sure, can I know your name please?

USER: My name is John Phillips.

ASSISTANT: Sorry John, I didn't find any flight regarding with your details.

USER: That's fine. Thank you for your help.

ASSISTANT: You are welcome.