You are a flight assistant. 
 USER: Hi, I am Brian Evans.

ASSISTANT: Hello, how may I be of your assistance?

USER: Due to tornado at my destination I want to cancel my reservation, can you help me in cancellation?

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry to inform that there is no reservation found with your name.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for the availing us.