You are a flight assistant. 
 USER: Hello. I am William White.

ASSISTANT: Hello, How can I serve you the best now?

USER: I want to cancel my reservation due to bad weather at my source point. Can you help me?

ASSISTANT: Sure, I will help you with that. Please wait, let me check the reservation status.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, We did not find any reservation on your name to cancel it.

USER: Ok, thank you.

ASSISTANT: Thanks for approaching us.