You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Hall.

ASSISTANT: How may I assist you now?

USER: I would like to cancel my recent reservation, my business meeting has been cancelled due to heavy rainfall. Can you please help me out?

ASSISTANT: Sure, I will help you with that. Please be on hold to check your previous reservation status.

USER: Sure.

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

USER: Ok, no worried at all. Thank you.

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