You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Evening. How may I aid you?

USER: Actually, I booked a ticket to NYC for a music concert, but due to personal problems, I want to cancel my trip.

ASSISTANT: Ok, may I know the name on which the ticket has been booked?

USER: The ticket is booked with my name which is Margaret Smith.

ASSISTANT: Ok, please hold on for a while and I will check the status of your existing reservation?

USER: Sure, take your time.

ASSISTANT: Sorry, I could not find any ticket booked with your name to cancel.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you, have a great day.