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