Lost silver alto saxophone in a black carrying case at a music festival in South Dakota.

I lost my silver alto saxophone at a music festival in South Dakota last weekend. It's in a black carrying case, and I remember setting it down for just a moment to grab some food. I realized it was missing when I tried to pack up to leave. There's a sticker with my name on it inside the case. I would love to get it back as it means a lot to me.