You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide service to you?

USER: I just want to cancel recent reservation due to ongoing tornado at my destination. Can you help me in this?

ASSISTANT: Sure, can I have your name to check in the reservation list?

USER: Sure, I am Andrew Williams.

ASSISTANT: Sorry, we do not found any reservation in your name to cancel.

USER: It's ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for your approach.