Hello.
user
Hello, how may I aid you at present?
assistant
I would like to change my reservation as I am leaving for delegates meet, can you please help me out?
user
Sure, I am here to help you to change it. Ok,  May I know your good name please?
assistant
Patrick Nelson here.
user
Ok, Please wait for a moment.
assistant
Sure.
user
Sorry to inform you that, there was no reservation found on your name to change it.
assistant
Ok no problem, thank you for your services.
user
Thank you for approaching us.
assistant