You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: I booked a ticket for New York to visit my Uncle but due my busy schedule. I am cancelling my trip. Help me to cancel my ticket.

ASSISTANT: Sure, we are happy to you. May I know your good name?

USER: Michael Williams.

ASSISTANT: Ok, Michael Williams, Please wait for a minute.

USER: Ok.

ASSISTANT: Thanks for your patience. Sorry, we did not find any existing reservation on your specified name.

USER: Thanks for the information.

ASSISTANT: Thanks for choosing us, have a nice day.