You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, please wait a moment. May I know your name for cancelling reservation?

USER: Ok. Yes, I am Benjamin Wright.

ASSISTANT: Sorry no reservation found on your name Benjamin Wright.

USER: Oh! that's fine.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your help.