You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Dorothy Smith.

ASSISTANT: How can I aid 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: Sure, I am glad to help you in cancelling your reservation. Please allow me a moment to check for your previous reservation status.

USER: Ok, proceed.

ASSISTANT: Thank you for waiting. Sorry to say, there is no active reservation have been found under your name in our database to cancel it.

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

ASSISTANT: Thank you for reaching us.