Hello.
user
Hello.
assistant
I am Mark Clark.
user
How can I serve you today?
assistant
I want to change my existing reservation due to postpone of my exams, can you help me with that?
user
Sure, I am here to help you.
assistant
Thank you.
user
Please wait.
assistant
Sure.
user
Sorry, no reservation found under your name to change.
assistant
No problem, thank you for the information.
user
Thank you for opting us.
assistant