Hello, Mark Jones here.
user
Hello, Mark. What can I do for you today?
assistant
My son is giving a presentation on international competition, but due to some sudden changes , I want to change my existing reservation. Can you please help me out?
user
Ok, let me check with your details.
assistant
Ok.
user
Mark, there is no reservation found under your name.
assistant
Ok, thank you for your information.
user
Thank you for contacting us. Have a nice day.
assistant