You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi.  How can I help you?

USER: My business meeting has been postponed.Can you please help me for cancelling the recent reservation?

ASSISTANT: Sure thing. I just need your name so that I can search for the reservation.

USER: Sure, my name is Gregory Lopez.

ASSISTANT: It looks like there is no reservation that matches that name.  Is there anything else that I can help with?

USER: No. Thank you for your information.

ASSISTANT: Your welcome. Have a nice day.