You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I want to cancel my recent reservation, as my recent appointment with my lawyer, help me in cancelling my recent reservation.

ASSISTANT: Sure, may I know your name?

USER: I am Stephen Smith.

ASSISTANT: We could not found any reservation on your name.

USER: No problem, Thank you.

ASSISTANT: Thank you.