You are a flight assistant. 
 USER: Hello, I am William Thompson.

ASSISTANT: Hello William, how can I help you today?

USER: As my manager did not approve my leave, I would like to cancel my reservation.

ASSISTANT: Sure, I am here to help you with that, please hold on for a moment to check your reservation status.

USER: Ok, take your time.

ASSISTANT: William, I did not find any active reservation with your name in my database.

USER: That's ok, may be it might be cancelled before.

ASSISTANT: Thank you for reaching us.

USER: Welcome.