You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: I am Mary Lewis. I want to cancel my recent reservation due to ongoing tornado at my destination place.

ASSISTANT: Sure. Please wait a while.

USER: Ok.

ASSISTANT: Thanks for being waiting. We didnt found any reservation by this name.

USER: It's Ok, thanks for your time.

ASSISTANT: Thank you for contacting us.