Hi.
user
Hello, how can I aid you?
assistant
 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?
user
Ok, please give me a minute.
assistant
Sure.
user
Thanks for waiting, there is no reservation found with your name.
assistant
It's Ok. Thanks for your information.
user
Thank you.
assistant