What will the airlines do when they can't fly the people who want to fly, due to lack of pilots?

I, and other guys at my airline that fly a lot, are already having some problems. So far this year, I have had 4 trips I wanted to fly on Delta that I could not, because there were not enough seats on Delta for the itinerary that I needed to fly. I have had several long delays due to lack of crews....and none of that had anything to do with the weather...