You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Suddenly the business meeting is cancelled for now, so please help me in cancelling my ticket?

ASSISTANT: Sure, I will help you in cancelling your reservation. May I know your name please?

USER: Ok, my name is William Scott.

ASSISTANT: Please wait a moment, I will check your status.

USER: Ok, take your time.

ASSISTANT: Sorry, there are no reservations found.

USER: It's ok, I think my sister had already cancelled it.

ASSISTANT: Thank you reaching us.

USER: Welcome.