You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: I need to cancel my reservation for a client meeting, but I have got a sudden call from my friend that one of my friends got to meet with an accident so I fail to cancel my reservation. Can you please help me out?

ASSISTANT: May, I know your good name?

USER: Daniel Green here.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.