You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Please cancel my recent reservation.

ASSISTANT: Sure, may I know your name please?

USER: My name is Nancy Lee.

ASSISTANT: Sorry to inform you Nancy but, We don't see any reservation on your name.

USER: Ok, not a problem.

ASSISTANT: Thank you for checking with us.

USER: Thanks for your quick response.