Hello.
user
Hello. How may I aid you?
assistant
I want to change my existing reservation, can you please help me with that?
user
Sure, I am here to help you.
assistant
Thank you.
user
May I know your good name please?
assistant
Myself James Clark.
user
Sorry, there are no reservation found on your name.
assistant
No problem, thank you for the information.
user
Thank you for choosing us.
assistant