You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nancy Young here.

ASSISTANT: How can I aid you today?

USER: I want to cancel my ticket due to dense fog in my place, could you help me out?

ASSISTANT: Sure, I will help you with that. Please hold on for a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation is found.

USER: No problem, thank you.

ASSISTANT: You are welcome.