Lost black North Face backpack with rainbow-striped straps in downtown Lawrence containing laptop, headphones, and notebooks.

I lost my black North Face backpack with rainbow-striped straps while I was walking through downtown Lawrence after a friend's concert. I was so busy chatting and celebrating that I didn't notice it had slipped from my shoulder. It contains my laptop, a pair of headphones, and some notebooks. If found, I would really appreciate getting it back as it holds a lot of important items for me.