You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicholas Green.

ASSISTANT: May I know your concern?

USER: Can you please assist me in cancelling my reservation as the meeting which I have scheduled to attend got postponed?

ASSISTANT: Yes, I will assist you with that.

USER: Thank you.

ASSISTANT: Thank you for waiting, sorry as per the database there is no reservation been found on your name.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you for choosing our agency.