Silver Yamaha flute with initials AJ, lost near Rittenhouse Square

I lost my silver Yamaha flute, a standard concert size, in a black hard case with blue velvet lining. There's a tiny dent on the head joint and the initials 'AJ' are engraved on the lip plate. I last saw it yesterday around 3pm near Rittenhouse Square Park, on 18th Street between Walnut and Locust, in Philadelphia - it's a wind instrument, a flute. This flute has sentimental value - it was a gift from my grandmother and I really need it back to keep playing with my community orchestra, so please contact me if you've seen it.