Hi. I am Carol Thompson.
Hello, how can I assist you?
  I already made a reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you please help me with that?
Sure. I am here to help you.
Thank you.
Please, wait.
Sure.
Thanks for waiting, there is no reservation found on your name.
It's ok, thank you for the information.
Thank you for availing us.