You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I have already reserved my ticket, but right now I want to cancel that reservation. Can you help to cancel that reservation?

ASSISTANT: Sure, may I know your name?

USER: I am Betty Collins.

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

USER: It's not a problem. Thank you.

ASSISTANT: Thank you for consulting us.