You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Due to sudden rainfall at my source, I want to cancel my recent reservation.

ASSISTANT: Sure, I am here to help you out. May I know your name please?

USER: I am Larry Brown.

ASSISTANT: Wait a moment please.

USER: Ok, I will wait.

ASSISTANT: Larry Brown, we haven't found any reservation under your name in our database.

USER: Ok, Thank you.

ASSISTANT: Thank you for choosing us.