You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Please help me in cancelling my recent reservation.

ASSISTANT: Can I know your name?

USER: Melissa Campbell.

ASSISTANT: Ok. Let me check details with your recent reservation.

USER: Sure.

ASSISTANT: Sorry, there is no reservation by your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you.