I have a reserve questions for the gurus....

I start a 2-day block of reserve tomorrow. I was not assigned a trip by 3pm today, nor was I assigned short call. I always have been given one or the other. Am I basically off tomorrow, and they have to assign me something by 3pm tomorrow for the next day? Can they put something on my line at 1201am tonight with a 1001am report, etc? Thanks.