Emerald-green budgie with yellow belly

I lost my emerald-green budgie yesterday around 3pm near the Jackson Square fountain on Main Street. He's a small bird, about 5 inches long, with an emerald green body, a bright yellow belly, and a tiny blue patch on his right wing. He also has a silver leg band with the numbers A12-47 on the left leg. The last time I saw him, he perched on a lamppost outside Riverside Market and then fluttered toward Oak Street near the Jackson Public Library. It's really important to me—he's my daughter's pet and comfort after a tough week, please reach out if you spot him.