Hello.
Hello. How may I assist you at this moment?
I would like to spend some more days with my family, please help me in changing my existing reservation.
Sure, I am here to assist you in changing the ticket  details. Can you please tell me your name?
Sure, my name is Donna Miller.
Ok, please give me a moment.
Sure, take your time.
I have checked in our site but I cannot find any ticket on your name to your help you out in ticket modification.
Ok, no problem. Thank you for your information.
You are most welcome and thank you for reaching us.