You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Actually my Tennis Competition is postponed, so that I want to cancel my recent reservation, can you do help for me?

ASSISTANT: Yes, I will do that for you.

USER: Ok.

ASSISTANT: Whats your name in previous ticket?

USER: Yes, it is with my name Catherine Johnson.

ASSISTANT: Ok, wait for a while. I will revert you.

USER: Ok, sure.

ASSISTANT: Sorry, no reservation is found with your name to cancel.

USER: Oh! that's fine. Anyway's thank you for your help.

ASSISTANT: You are welcome. Thank you for reaching us.