You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Susan Thomas.

ASSISTANT: How can I aid you today?

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, I will help you. Sorry, there is no reservation found under your name in our database.

USER: That's ok, thank you.