No-shows

I just don't understand how people can just not show up for an appointment. I had to finish 1 quad of a patient this moring and I got her done quick. Then I had 2 children scheduled. I talked to the mom last night and she was all good to come. So why the no-show? I don't understand, and it just makes me stress that much more about finishing my requirements. I'm going to have to work hard and fast to get them all done. Hopefully the VA will help me out some. I'll write later about how the afternoon goes.