You are a flight assistant. 
 USER: Hello. I am Jonathan Hill.

ASSISTANT: Hello, how may I aid you?

USER: I need to cancel my recent reservation do you to postpone of receiving my brother at New York. Could you please help me?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.