Hi.
Hello. How can I assist you for the day?
I want to change my existing reservation. Can you help me for that one?
sure, I am here to help you with that. May I know your name please?
Sure, Paul Walker here.
Please wait for a while.
Sure.
We have found the reservation under your name. Can you please share your new  preferable airport codes?
Thank you, my planned airport codes are  OAK to ATL.
May I know your new planned travel dates?
My planned travel dates are 12/12 and 12/14.
Do you have any other specifications?
I want a flight with single connection with in the economy class only.
There is a connecting flight-1019 in Frontier Airlines with a fare of 200.  Would you like to book this ticket?
Yes, you can proceed with that booking.
Your booking has been done in economy class.