Hi.
Hello. How may I assist you?
Can you help me in changing my recent reservation, as my exam is postponed?
Sure, I am here to help you out.
Ok.
May I know your name please?
Please check under the name Gregory Wilson.
Wait a moment please.
Sure.
Gregory Wilson., we haven't found any reservation under your name in our  database.
That's ok, thank you for checking.
Thank you for reaching us.