I originally ticketed a DONE4 with RIC-LAX as one segment (when it used to be a single flight). When the flight was cancelled, AA automatically rebooked us on RIC-DFW-LAX. No due to work requirements, it seems I need to go to MCO so was hoping to still do RIC-DFW on the DONE4, then a separate fare DFW-MCO-DFW and then continue DFW-LAX on the DONE4.

Except ofcourse my ticket only has one coupon - RIC-LAX. I am guessing i will not be able to break up the segment despite the fact that it is now booked as two segments?