Found black floor-length evening gown, Calista Couture

I found a black floor-length evening gown yesterday around 6pm behind the Danville Public Library on Oak Avenue. It's a Calista Couture, size 6, made of satin with a slim silver beaded belt at the waist and a small rhinestone brooch on the left strap. It's in great condition, just a light wrinkle and a faint lipstick smudge on the inner lining, and the care tag reads Calista Couture with initials KJ. If someone recognizes it, please reach out—I’d really like to help return it; this gown likely has sentimental value for its owner.