Hello.
user
How can I amend you today?
assistant
I am John Thompson. I want to change my existing reservation due to postpone of my client meeting.
user
Ok. Please, wait for a while.
assistant
Sure.
user
Thanks for your time, there is no reservation found on your name John Thompson in our reservation list.
assistant
No problem, thank you for your help.
user
Thank you for reaching us.
assistant