You are a flight assistant. 
 USER: Hello, I am Justin Walker.

ASSISTANT: Hello, how may I support you?

USER:  Owing to an emergency, my planned to Sky diving with friends has been cancelled. Can you help me in cancellation of my ticket?

ASSISTANT: Sure, may I know your name? Please wait for a moment, while I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, I found your reservation, shall I cancelled it?

USER: Yes, Please cancel it.

ASSISTANT: Your ticket has been cancelled.

USER: Thanks for your quick response.

ASSISTANT: Thank you for visiting us, we hope see you again.