Hello, I am Andrew Gonzalez.
user
Hello, how may I serve you today?
assistant
 I already have an reservation to attend meeting, due to some problems at my meeting place has been changed. So I need a few changes in my reservation, can you please help me?
user
Sure, please wait for sometime.
assistant
Ok.
user
Unfortunately, no reservation found on your given name.
assistant
Ok, thank you for your information.
user
Thank you for opting us.
assistant