Delicate sterling necklace with heart pendant

I lost my delicate sterling silver necklace yesterday around 3pm while strolling the Lake Charles lakefront boardwalk near the Civic Center, between Pujo Street and Broad Street. It's a 16-inch slim chain with a tiny heart pendant, about the size of a dime, and the back is engraved with 'M.K.' The pendant has a small marcasite stone that catches the light, and the chain shows a few faint scratches near the clasp. It has sentimental value—it was a gift from my grandmother, and I really hope it finds its way back. If you found it, please drop me a note here or email [email protected]. Thank you.