Hi.
Hello, how may I aid you?
I am George Moore. I need to change my existing reservation as my exams got postponed, Can you please help me with that?
Sure, I will help you. Please wait a minute. I will check and get back to you with your ticket reservation details.
Sure, I will wait for your response.
Sorry George, there is no reservation found under your name in our records.
Ok, no problem. Thanks for your quick response.
Most welcome.