You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My business meeting is postponed to next month, so can you cancel my reservation?

ASSISTANT: Sure, may I know your name please?

USER: My name is Paul Williams.

ASSISTANT: There is no reservation on your name, Paul.

USER: It's ok. Thank you for your service.

ASSISTANT: Is there anything you want to know?

USER: Nothing more, thank you.

ASSISTANT: Thanks for contacting us. Have a nice day.