Hi.
user
.Hello, how can I help you today?
assistant
Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?
user
May, I know your good name please?
assistant
I am Dennis Anderson.
user
 Sorry, there is no reservation matching with your name in our portal.
assistant
Ok, no problem. Thanks for the information.
user
Thank you for choosing us.
assistant