Hello.
Hello. How can I aid you today?
I am Jeffrey Wright. I need to change my reservation due to my external exams got postponed. So please help me with that.
Sure, we are here to help you with that.
Thank you for considering my request.
Please wait for a moment, let me check your previous reservation status.
Sure, I am ready to wait for your response.
There is no active reservation found with your name in our database to change it.
I will check my mail once again about confirmation my ticket and I will get back to you if necessary.  Anyway, thank you for your time.
Thank you for reaching us, have a great day.