Hello.
Hello. How can I assist you now?
I want to change my existing reservation, as my exams got postponed. Can you please help me out with it?
Sure, I am happy to help you with that.
Thank you for the response.
Can I have your good name please to check your reservation status?
Myself Mary Brown.
Ok, please wait  a moment.
Ok, sure. I will wait for your response.
Sorry Mary Brown, no reservation has found under your name to change.
Ok, not an issue. Anyways, thank you for the information.
Thank you for choosing us, have a good day.