Hello.
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
Sure, I am here to help you. May I know your name?
assistant
I am Patricia Lewis.
user
There is no reservation found under your name.
assistant
 Not a problem, thank you for the information.
user
Thank you for choosing us.
assistant