Navy blue evening gown with silver beading

I lost my navy blue evening gown with silver beading yesterday around 7:30pm after the wedding reception at the Yreka Elks Lodge on South Main Street. It's a David's Bridal floor-length dress, size M, with a delicate silver belt and a small tear near the left hem. The inner lining has a tiny embroidered initial 'A' I stitched as a keepsake, which could help identify it. I really need it back—it's sentimental, and I have a charity gala next weekend in Mt. Shasta City Park and no time to replace it.