You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you now?

USER: Please help me out in cancelling my recent reservation.

ASSISTANT: Sure, I am glad to help you with that.

USER: Ok.

ASSISTANT: Can I know your name to check your previous reservation?

USER: Mary Harris is my name.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: We regret to inform you that, there is no reservation found on your name in our reservation list.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us, hope you have a great day.