You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to cancel my reservation as my brother have an operation tomorrow. Can you please do that for me?

ASSISTANT: May I know your name?

USER: Sure, my name is Rebecca Johnson.

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

USER: Not an issue. Anyway, thank you very much for the information.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: You are welcome and thank you for choosing us.