Hi.
Hello, how can I aid you?
 Due to sudden changes in the dates of summit which was going to be held in the place where I suppose to visit, I want to do some changes in my existing reservation. Can you help me in changing the reservation made on name Gary Taylor?
Ok, please give me a minute.
Sure.
Thanks for waiting, there is no reservation found with your name.
It's Ok. Thanks for your information.
Thank you.