You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I best assist you now?

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: Sure, May I know your name for proceeding further.

USER: Melissa Green here.

ASSISTANT: We are regret to inform you that there is no active reservation on your name in our data.

USER: That's ok, thank you for your help.

ASSISTANT: Thanks for reaching us.