Hello.
user
Hello. How can I help you today?
assistant
I want to change my existing reservation, can you please help me with this?
user
Sure, I am here to help you with that, can I know your good name to proceed further?
assistant
My name is Joseph Williams.
user
Sorry to inform you that there is no active reservation on your given name.
assistant
No problem, thanks for your information.
user
Thank you for reaching us.
assistant