You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Due to tornado going on in my destination location. So, I decided to cancel my reservation. Can you help me in cancelling the ticket?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: May I know your name for checking your previous reservation status?

USER: Myself Donald Lee.

ASSISTANT: Ok, just give me a moment, I will check flight availability.

USER: Ok.

ASSISTANT: There is no previous reservation available on your name.

USER: That's ok, not an issue.

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

USER: Thank you for your information.