Formal High/low Long Dress Flowy Dress

Never worn Bridesmaid dress - purchased from bridal shop for a destination wedding that did not take place. Flowy, coral colored, high/low front, chiffon top layer with angel wing shoulder straps, zipper back, built in bra cups. Purchased a size 16 to fit a 36D bra size with the intention of being altered to fit 7/8. Would be a beautiful prom dress or dress to attend a wedding as a guest. Smoke free home.