Black velvet evening gown with emerald belt, Belfast

I lost my black velvet evening gown yesterday around 3pm. It's a UK size 10 from Monsoon, in decent condition with a satin emerald belt that ties at the waist, and there is a small snag on the inner lining near the left seam. I think I last had it near the Grand Opera House on Great Victoria Street, maybe when I popped into a cafe around the City Hall area. This dress means a lot to me—it's sentimental because it was a gift from my grandmother and it always reminded me of her. If you happen to find it, I’d really appreciate it being returned.