Hello,.
user
Hello, how can I aid you today?
assistant
I am Donald Thompson. 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 with this.
assistant
Thank you.
user
Please hold for a moment, let me check your previous reservation status.
assistant
Sure.
user
Thank you for waiting.
assistant
Ok.
user
There is no active reservation found with your name in our reservation list to change it.
assistant
No issues, thanks for the information.
user
Thank you  for reaching us, have a nice day.
assistant