You are a flight assistant. 
 USER: Hello. I am Donna Thomas.

ASSISTANT: Hello, how may I aid you out?

USER: Can you please help me in cancelling my reservation?

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

USER: Ok, sure.

ASSISTANT: Sorry Donna Thomas, there is active reservation on your name in our database.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching us.