Hi, I am Nancy Moore.
user
Hello. How may I help you today?
assistant
I need to change my recent  existing reservation due to postpone of my engagement. Could you please help me in doing that?
user
Sure. Please wait I will get back to you.
assistant
Sure.
user
Thanks for waiting, no reservation found with your given name.
assistant
No problem, thank you for your information.
user
Thanks for choosing us.
assistant