Hi.
Hello. What type of help that you are expecting from my side?
I am Samuel Harris. I want to change my existing reservation due to postpone of my exams so, can you please help me with this?
Sure, please be on hold for a moment to check your booking.
Sure.
 Thank you for waiting, I have checked in reservation list to change your ticket but could not find any reservation with your name.
Not a problem, thank you for the information.
You are most welcome.