I didn t know I had to work tonight??
Not today, apparently. Yesterday I worked a double and it was listed on the front schedule as usual. Today, I worked a typical morning bus shift. That was all that was listed in the front schedule, so I assumed that was the only shift I had to work today, and I made plans. While I was out, I get a phone call from a coworker (my boss is not there in the evenings). "Hey, weren t you supposed to work an evening dish shift tonight?" "Um, no?" "...Are you able to show up?" "I don t think so, sorry."