Hi, I am Alexander Lewis.
Hello,. How can I abet you today?
 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.
Ok.
Can you please change my existing reservation?
Sure, we are here to aid you.
Thank you.
Please, wait.
Sure.
Thanks for waiting,. There is no reservation found on your name in our database.
Ok, it's not a problem.
Thank you for opting us.