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 Sarah Jackson.
Please wait for a mean while.
Ok.
Sorry Sarah, there is no reservation found as per your name to change your reservation.
That's ok, thank you.
You are welcome and have a great day.