You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you today?

USER: I am David Edwards, I want to cancel my recent reservation due to ongoing tornado at my destination point.

ASSISTANT: Sure, I will help you out in this. Please wait a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry we couldn't find any reservation on your name.

USER: Ok, thank you for your kind response.

ASSISTANT: Thank you for availing with us.