You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I provide you the assistance?

USER: I need to cancel my reservation on the name of Jack Collins due to ongoing Tornado at my destination place. Will you help me in this?

ASSISTANT: Sure, I will help you in that. Please wait, I will check your reservation status.

USER: Sure.

ASSISTANT: Thanks for waiting. We are sorry that, we did not find any reservation on your name to cancel it.

USER: No problem, thanks for your effort.

ASSISTANT: Thanks for your presence.