Hi.
Hello, how may I serve you today?
Could you please change my existing reservation due to postpone of my exams?
Sure, I am here to help you with this. May I know your good name please?
My name is Rebecca Hernandez.
Ok, wait for a mean while.
Sure.
Sorry to say, that there is no active reservation found on your name to change it.
Not a problem, thank you.
You are welcome.