You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your good name, Please?

USER: Due to venue change of our Musical concert, I want to cancel my recent reservation.

ASSISTANT: OK.

USER: Can you please check is there any reservation on the name of Lisa Carter?

ASSISTANT: Sure. Thanks for waiting. We are very sorry to inform you that, There is no reservation found on Lisa Carter.

USER: Ok, no problem.

ASSISTANT: Thank you, For approaching us for ticket cancellation.

USER: Thanks for your information.

ASSISTANT: Have a great day.