You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Donna Walker here. I want to cancel my ticket due to dense fog in my hometown.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: No problem, thank you.

ASSISTANT: That's ok, thank you for opting us.