You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to cancel my reservation as my meeting with client is cancelled. Can you cancel my reservation?

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

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Donna Nelson.

ASSISTANT: Wait a moment please.

USER: Sure.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.