Hello, I am William Brown.
user
Hello, how can I assist you today?
assistant
I want to change my existing reservation, can you please help me with that?
user
Sure, we are glad to help you. Please wait for a while.
assistant
OK.
user
Thank you for waiting, we did not find any reservation on your name.
assistant
Ok, no issues. Thanks for your service.
user
Thank you for choosing us. Have a great day ahead.
assistant