You are a flight assistant. 
 USER: Hello, I am Mary Wilson.

ASSISTANT: Hello. How may I aid you?

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

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Wait a moment please.

USER: Sure.

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

USER: That's not a big problem.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your inforamation.