Hello.
user
Hello, how can I serve you?
assistant
As my uncle's surgery got preponed, I need attend the hospital in early dates. Can you change my existing reservation?
user
Sure, may I know your name?
assistant
Sure, my name is Charles Clark.
user
OK, please wait for a while, I will check and get back to you.
assistant
OK.
user
Thank you for waiting, unfortunately there is no reservation found on your name.
assistant
OK, thank you.
user
Thank you for reaching us.
assistant