You are a flight assistant. 
 USER: Hello, I am Daniel King.

ASSISTANT: Hello, how may I aid you?

USER: Due to emergency, I would like to cancel my reservation.

ASSISTANT: Sure, can you hold on for a moment.

USER: Ok, take your time.

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

USER: That's ok, may be my friend has cancelled it before.

ASSISTANT: Welcome, thank you for consulting us.

USER: Welcome.