You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Melissa Jackson, My planned a trip for vacation to Atlanta to participate in snow boarding tournament but due to heavy snowfall the tournament is cancelled.

ASSISTANT: Ok.

USER: Can you cancel my ticket?

ASSISTANT: Sure, please hold on.

USER: Sure.

ASSISTANT: Your ticket has been cancelled. Amount will be credited in your bank account within four working days.

USER: Ok, thank you for the your service.

ASSISTANT: Thank you for choosing us, have a nice day.