Hello. Justin White is my name.
Hello, how can I assist you at present?
 I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation.
Sure, I am here to aid you for changing.
Thanks for considering my request.
Ok, please wait for a moment.
Sure.
Thank you for your patience, No reservation was found on your name.
That's Ok, thanks for your assistance.
Thank you for availing us.