Hello.
Hello, how may I oblige you today?
I would like to change my flight reservation as my trip got postponed, can you please help me?
Sure, I can change your reservation right now. Before that I need to know your good name please?
I am James Hall.
 Thank you. Please stay online for a while, I will check your reservation status and let you know.
Ok, take your time.
Sorry to say that, there is no active reservation found on your name.
Ok, no issues. Thank you for the information.
Thank you for opting us.