You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I have already reserved my ticket, but now I want to cancel that reservation. Could you please help me with this?

ASSISTANT: Sure, may I know your name please?

USER: I am Jonathan Green.

ASSISTANT: OK Jonathan Green, please hold on.

USER: Sure.

ASSISTANT: Sorry Green, there is no reservation found on your name.

USER: OK, that's alright then.

ASSISTANT: Thank you, for consulting us.

USER: Thanks for helping me.