Navy satin evening gown with crystal strap

I found a navy satin evening gown this afternoon around 4:15pm outside the Market Street entrance to PPG Place in downtown Pittsburgh. It's floor-length, size roughly 6, with a beaded, crystal-embellished shoulder strap and a satin belt with a small bow at the back. The gown is in good condition except for a light wrinkle from sitting on the sidewalk, and there’s a silver rhinestone brooch pinned to the left shoulder plus an inner label that reads 'Deco Atelier'—two details I hope help identify it. This gown seems to be meaningful to someone; it looked like it could be a gift or hold sentimental value. If it's yours, you can reach out through the app with a description of the brooch and the label to confirm.