You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I have already booked a flight ticket to Boston, but now I'm not interested to travel due to some health issues. Could you please help me in cancelling my reservation?

ASSISTANT: Sure, can I know your name for checking?

USER: My name is Carol Jones.

ASSISTANT: Hold on for a moment. I found a reservation on your name.

USER: Ok, please cancel the ticket.

ASSISTANT: Ok Carol, your ticket has been cancelled.

USER: Thank you, I appreciate your help.

ASSISTANT: Thank you, have a nice day.