You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name please?

USER: Actually my Chess competition is postponed so that I want to cancel my recent reservation, can you help me? Sure, I am Brandon Hall.

ASSISTANT: Sure, I will help you with that. Brandon, please wait for a moment. Sorry Brandon, there is no reservation found on your name.

USER: OK, no problem. Thank you for your information.

ASSISTANT: You are welcome. Have a great day.