Hello.
user
Hello, how can I help you today?
assistant
My name is Nancy Young. I would like to change my existing reservation.
user
Sure, I am mirthful to help you with this. May I know your name please?
assistant
I have already mentioned.
user
Ok, please wait for a moment.
assistant
Sure, take your time.
user
There is no active  reservation found with your name in our database to change it.
assistant
No problem, Thank you for your time.
user
Thank you for reaching us, have a nice day.
assistant