You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Carol Clark here. 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 am here to help you out with that. May I know your travelling dates please? Wait a moment please.

USER: Ok.

ASSISTANT: Carol Clark, we haven't found any reservation under your name in our database.

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

ASSISTANT: Thank you for choosing us.