You have to call the AirTran Airways Event savers Desk at 1-866-683-8368 (ignore the recording as they are still honoring existing codes)
Monday - Friday 8am – 9pm
Tell them you want to make a reservation:
They will ask you for the Event code & Event Name: ZZMBJ072912 and Michelle's Bday Celebration
You get:
10% off of lowest available airtran airways fare
advanced seat assignments
one time waiver of change/cancel fee
reservations can be held up to 10 days without payment
I don't have the contract in front of me but the travel window is late July to something like August 15th