Hello, I am Gregory Davis.
user
Hello,. Please let me know, What kind of service you are looking for today?
assistant
I want to change my existing reservation due to postpone of my exams, so can you help me with this?
user
Sure, I will help you with that.
assistant
Thank you.
user
Thank you for waiting. I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
Not a problem, thank you.
user
Thank you for choosing us.
assistant