You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Due to cancellation of my tournament, I would like to cancel my existing reservation.

ASSISTANT: Sure, can I know your name?

USER: My name is Melissa Nelson.

ASSISTANT: Your reservation is cancelled.

USER: Thank you for cancelling my ticket.

ASSISTANT: Thank you, have a good day.

USER: Welcome.