Hello, I am Janet Perez.
Hello, how may I best serve you today?
 already have an reservation to attend at my meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you help me in changing the reservation?
Sure, please wait for a moment.
Ok.
Thanks for waiting, no reservation found with your name to change your reservation.
Ok, not an issue. Thanks for the information.
Thanks for contacting us.