You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to cancel my ticket due to dense fog in my place.

ASSISTANT: I am here to help you with your concern. May I know your name please?

USER: Cynthia Young here.

ASSISTANT: Wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found for the user name in our back end to cancel it.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.