Green parakeet with blue tail found near Riverfront Park

I found a small green parakeet this afternoon around 4:15pm, flitting along Court Street near Riverfront Park by the Salem Public Library. It's about the size of a palm, mostly emerald green with a bright blue tail and a tiny white scar on its left wing. There’s a red leg band with the code 'A12' that caught my eye, but otherwise it's in good health and squawks when I speak to it. If the owner sees this, I'd really love to help get it back—it's clearly someone's pet and this city park isn't the same without it.