Hello,. I am Debra Mitchell.
user
Hello, how can I serve you today?
assistant
I want to do some changes in my existing reservation because my friends are not able to come on those dates. Can you please help me?
user
Sure,Please wait a moment.
assistant
Ok.
user
Sorry there is no existing reservation found in your name.
assistant
Thank you for your great service.
user
Thanks for choosing us.
assistant