Hello. My name is Nancy Hill.
user
Hello, how can I assist you today?
assistant
I want to make some change in my existing reservation, can you please help?
user
Sure, I can help you with that. Please wait for a while.
assistant
Sure.
user
Nancy Hill, there is no reservation found active under your name to do changes in that.
assistant
No problem, thank you anyway.
user
Thank you for choosing us, have a great day.
assistant