You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I assist you?

USER: As I am tennis player I want to cancel my recent reservation due to the bad whether my match has been cancelled.

ASSISTANT: May I know your name?

USER: Sure, my name is Cynthia Collins.

ASSISTANT: I'm sorry, no reservation found.

USER: Not a problem.

ASSISTANT: Thanks.