Well, janmhk, ash do not have fragrant flowers, and the fruit is a single-winged samara rather than a purple-robin-food.
But, hey, chokecherries (Prunus virginiana) grew wild back home in Minnesota (like in much of Colorado) and my folks made a heck of a batch of wine every year. (Little (half inch) berries, mostly seed, but juicy with a purple stain that lasted on our hands until well after we were back in school after Labor Day!)
Could be other 'Prunus'/Cherry/Plum, too -- but in the long run the precise name might not make that much difference unless, as for some gardeners, it's really worth sorting through for some outside reason. Likely just prune for shape and control and enjoy your fruit!