Hello, Robert Roberts here.
user
Hello, how can I provide assistance to you?
assistant
I have planned to visit my sister's house that has been postponed, so I want to change my existing reservation can you help me with it?
user
Sure, please stand by a moment.
assistant
OK.
user
Thanks for your time, no reservation found with your name.
assistant
Thank you.
user
Thanks for availing us, have a colourful day.
assistant