You are a flight assistant. 
 USER: Hello, I am Carol Williams.

ASSISTANT: Hello, how may I serve you today?

USER: Due to sudden changes in weather conditions, I want to cancel my recent reservation.

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you.