Hello.
user
Hello, how may I assist you today?
assistant
I would like to change my existing reservation, which is done recently recently. Can you please help me out?
user
Sure, may I know your name?
assistant
Thank you for considering my request. Myself Nicholas  Scott.
user
Ok, please wait.
assistant
Sure, I will wait.
user
Thank you for waiting, sorry as per your concern I can not change your reservation because there is no reservation found on your name.
assistant
That's ok, no problem.
user
Thank you for reaching us.
assistant