You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

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

ASSISTANT: Sure, I am oblige to help you with that. Please wait a moment to check your previous reservation.

USER: Sure.

ASSISTANT: We regret to inform you that, there is no reservation found on your name in our records.

USER: No problem, thank you.

ASSISTANT: Thank you for approaching us, have a great day.