Hello. I am Sandra Green.
user
Hello, how may I aid you today from my end?
assistant
I want to change my change my existing reservation due to postpone of my event. Could you please help me?
user
Sure, I am here to help you out. Please allow me a moment.
assistant
Sure.
user
Sorry  Sandra Green, there is no reservation on your name in our database.
assistant
No worries, thank you for the information.
user
Thank you for reaching us.
assistant