Hi.
Hello, how may I help you today?
As my exam got postponed, I want to change my existing reservation. Can you help me out?
Sure, I am here to help you with this. May I know your name please?
Sure, my name is Robert Martinez.
Please wait for a moment.
Ok.
Sorry Martinez, there is no reservation found as per your name to change it.
That's ok, thank you.
You are welcome always.