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

ASSISTANT: Hello, how may I aid you today?

USER: I want to cancel my reservation due to heavy rainfall at my place.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a reservation on your name and it is successfully cancelled.

USER: Ok, thank you.

ASSISTANT: Thank you for availing us.