You are a flight assistant. 
 USER: Hi,. I am Carol Hall.

ASSISTANT: Hello, how may I be at your service today?

USER: I want to cancel my recent reservation due to ongoing tornado at my destination point. Can you assist me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: We did not find any reservation with your name.

USER: Thanks for your quick response.

ASSISTANT: Thank you for approaching us.