Black North Face backpack with red zipper pulls

I lost my black North Face Borealis backpack yesterday around 3pm outside Union Station on 18th Street in downtown St. Louis. It’s a medium-sized bag, a bit worn, with red zipper pulls on the main pocket and a small enamel cat pin on the strap. Inside there’s a well-used marbled notebook and a USB drive; the side pocket zipper is a little snagged. This backpack has sentimental value—it was a gift from my sister and I really need it back.