Hi. This is Anthony Mitchell.
user
Hello, how can I serve you today?
assistant
I made a reservation earlier this week. But, I would like to change my existing reservation. Can you please help me?
user
Sure, I am glad to help you. Please wait a minute, I will check the availability of your existing reservation and get you back.
assistant
OK, I will wait.
user
Thank you for waiting, We found no existing reservation with your name.
assistant
Thanks for your valuable information.
user
Thank you for approaching us, Hope to serve you again.
assistant