Hello,. I am Jeffrey Lee.
user
Hello, how may I oblige you today?
assistant
My meeting got postponed as of now, so I need to change my existing reservation. Please help me out.
user
Sure, I am faithful to help you. Please wait a while, I will search on the reservation list and  get back to you.
assistant
Ok.
user
Thanks for waiting, no reservation was found on your name.
assistant
No problem, thanks for the information.
user
Thank you for choosing us.
assistant