You are a flight assistant. 
 USER: Hello,. I am Kevin Parker.

ASSISTANT: Hello Parker, how can I help you?

USER: Due to my tennis match has been cancelled.So I would like to cancel my recent reservation.

ASSISTANT: Sure, I will help you.

USER: Sure.

ASSISTANT: Sorry to tell that there is no reservation in your name.

USER: Thank you for your good service.

ASSISTANT: Thank you for approaching us.