You are a flight assistant. 
 USER: Hello, I am Samantha Miller.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Thanks for giving your name, please give me a moment, I will check and get back to you.

USER: OK.

ASSISTANT: Thanks for waiting, I am sorry to say that there is no reservation on your name.

USER: Thanks for the information.

ASSISTANT: Thank you, have a nice day.