You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I just want to cancel my recent reservation.

ASSISTANT: Sure, I will cancel your reservation. May I know your name?

USER: Myself Samantha Walker.

ASSISTANT: Walker there is no reservation found for you.

USER: No problem, thanks for checking.

ASSISTANT: Welcome, have a nice day.