Hello.
user
Hello, how can I help you?
assistant
I want to change my existing reservation due to postpone of  my exams. Can you help me in that?
user
Sure, I am happy to assist you. May I know your name?
assistant
Shirley Phillips.
user
Thank you. Please be on hold for a while, let me check your reservation status.
assistant
Ok.
user
Sorry, there is no reservation found under your name in our database.
assistant
Ok, no problem. Thank you.
user
You are most welcome.
assistant