Black leather briefcase with initials tag

I lost my black leather briefcase yesterday around 3pm near the Millennium Park entrance on Columbus Drive. It's a slim Coach briefcase, about 14 inches wide and 11 inches tall, with a brass zipper and a tiny scuff on the lower front corner. The inside has a bright red lining and a couple of important papers, plus a small brass plate on the outside engraved 'A.K.' and a leather luggage tag that says 'Property of A. Kim.' This briefcase means a lot to me—it contains my late grandmother's recipe notebook and a few personal photos. If anyone turned it in or sees it, please reach out; I really need it back.