You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My plans to visit New York has shifted to other day, so could you please help me in cancelling my recent reservation?

ASSISTANT: Please provide your name to cancel your reservation.

USER: I have reserved my ticket with the name of Andrew Hill.

ASSISTANT: Sorry Hill, no reservation has been found on your name in our database.

USER: Ok, no problem, may be my ticket is not booked properly.

ASSISTANT: Thank you for using our services.

USER: Thank you for your information.