Hello,.
user
Hello, How may I serve you today?
assistant
I want to change my existing reservation as my exam got postponed. I am Nancy Perez.
user
Ok, please provide your name. Thank you for providing your name.
assistant
Ok.
user
I will revert you.
assistant
Sure I will wait.
user
Thanks, but no reservation with your name.
assistant
Ok, no issues. Thank you for your service.
user
Thank you for choosing us.
assistant