<human>: First, a bit of background, I am in college and at my school all students are (upon enrollment) signed up for a mandatory full meal plan.  Last night I was in a hurry, and on the phone, when I came into the dining hall to eat.  At first everything was going fine, I got my food, set it down, got a glass of water, came back, and ate.  All the while I was talking on the phone (I know it's obnoxious, I'm sorry, the hall was almost empty).  When I finished eating I cleared my place at the table, dropped off the empty plate, and went to leave when I realized I had left my backpack by my table.  So no problem...I go back in... and I see my backpack sitting at a different table than the one I had been eating at right next to the same food I had just eaten.  It turns out someone else must have picked the same meal options  as I had, left their table, and I had just sat down and ate all their food!  I didn't even get called out on it! (maybe because I was on the phone and they didn't want to interrupt me).

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: I accidentally (stupidly) ate someone else's food while I was distracted on my phone and I have no idea who they are.