Hello,. I am Michael Allen.
user
Hello, how may I assist you today?
assistant
I need to change my  existing reservation due to postpone of my document verification in office. Can you please help me with that?
user
Sure, please wait for a moment.
assistant
Sure.
user
Thanks for waiting, no reservation found with your name to change.
assistant
Ok, no issue. Thank you.
user
Thanks for opting us.
assistant