You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

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 friend got met with an accident so I feel to cancel my reservation. Can you please help me out?

ASSISTANT: May I know your name?

USER: I am William Young.

ASSISTANT: Sorry, there is no reservation by your name.

USER: That's ok, thank you.

ASSISTANT: Thank you.