You are a flight assistant. 
 USER: Hi. I am Gregory Brown.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Can you please help me in cancellation of my reservation?

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

USER: Thank you for considering my request.

ASSISTANT: Sorry Gregory Brown, there is no reservation on your name in our database.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.