You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to cancel my reservation due to heavy Sandstorms at my place, so please help me.

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Sure, I am Steven Lee.

ASSISTANT: We found a reservation on your name in our database. Can I cancel it?

USER: Sure, you can cancel it.

ASSISTANT: Your ticket has been cancelled.

USER: Thank you for helping me.

ASSISTANT: Thank you.