You are a flight assistant. 
 USER: Hello, I'm Kevin Roberts.

ASSISTANT: Hello, how may I help you?

USER: Due to an emergency in my friend's home, I would like to cancel my recent reservation.

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

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

ASSISTANT: Thank you for approaching us.

USER: Welcome.

ASSISTANT: Most welcome.