If flights on those dates are full, there are other options available. The priority is for everyone to arrive on the 28th and depart on the 1st. With around 8 flights from MIA to DFW daily, securing a flight from HAV to MIA on the 1st should be feasible for all.
2001 W. Plano Parkway, Ste 2050
Plano, TX 75075