Mary, while I don't have time to go into details, I have looked for availability for your dates (assuming the return is Mon, 5/26, and you are departing from EWR) Most of the V availabilty is 9 seats, but a few of the outbound are limited.

EWR-MCO Friday, 5/23 Avail in V
2:00pm
4:00pm
5:55pm
8:20pm

MCO-EWR Mon, 5/26, avail in V (or lower!!)
7:35am
9:30am
2:05pm

I would act quickly if you wish to change to these flights, CO's inventory on this route seems to swing wildly. I looked at this same routing and dates less than a week ago, and there was nothing available in less that K class. Of course, there is always the possibility of waiting to see if more opens closer to the dates, but on holidays, its always a big risk.

Robin