Hi. I am Steven Campbell.
user
Hello, how can I guide you for today?
assistant
I would like to change my recent  reservation, as my exam is postponed? Can you help me?
user
Sure, I will help you with that.
assistant
Ok.
user
Please give me a minute, I will check the status of your existing reservation.
assistant
Sure.
user
Sorry, there is no reservation found under your name in our database.
assistant
That's ok, thank you.
user
Thank you for contacting us, have a nice day.
assistant