Hello.
user
Hello, how can I assist you today?
assistant
I am Stephen Perez. I want to change my existing reservation due to postpone of my exams, so can you help with this?
user
Sure, please wait for a moment.
assistant
Sure.
user
Sorry to say that, no reservation was found with your good name.
assistant
Not a problem, thank you for the information.
user
Thank you for reaching us.
assistant