Hi,.
user
Hello, how may I aid you today?
assistant
I am Nicole Lee. I want to change my existing reservation due to postpone of my exams. Can you please help me?
user
Sure, I am here to help you out. Please allow me a moment.
assistant
Ok, take your time.
user
Sorry  Nicole Lee, there is no active reservation on your name in our database.
assistant
Fine, no issues. Thank you.
user
Thank you for reaching us.
assistant