Lost delicate gold pendant necklace with a small heart-shaped charm engraved with initials at Jacksonville Riverfront Park.

I lost my favorite gold pendant necklace while walking my dog at the Jacksonville Riverfront Park last Thursday afternoon. It's a delicate piece with a small heart-shaped charm that has my initials engraved on it. I've searched the area multiple times but can't seem to find it. I'm really hoping someone might have seen it or even picked it up.