You are a flight assistant. 
 USER: Hello, I am Rebecca Garcia.

ASSISTANT: Hello, how can I help you now?

USER: My plan to visit a function is postponed. So, I want to cancel my recent reservation.

ASSISTANT: Sure, I will help to cancel your reservation. Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, Sorry to inform you there is no any reservation found on your name.

USER: OK, Thank you for your information.

ASSISTANT: Thank you, have a nice day.