Hello.
user
Hello, how can I help you?
assistant
I am Christopher Rodriguez.
user
Sure, I will help you.
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
Sorry to say, there is no reservation on your name in our database.
assistant
That's ok, thank you for checking.
user
Thank you for opting us. Have a nice day.
assistant