Hi. I am Carol Thompson.
user
Hello, how can I assist you?
assistant
  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?
user
Sure. I am here to help you.
assistant
Thank you.
user
Please, wait.
assistant
Sure.
user
Thanks for waiting, there is no reservation found on your name.
assistant
It's ok, thank you for the information.
user
Thank you for availing us.
assistant