Hello.
Hello. How can I serve you?
I am very happy to change my existing reservation because my examination was postponed, now I have much time to prepare for the exam. So please help me in modifying my recent reservation.
 Sure,Please wait a while.
Take your own time.
Thanks for your time.
It's ok.
We didn't found any reservation by this name.
It's not a problem.
Can I know your name?
I am Eric Green.
Thank you for choosing us.