What kind of dove do you think this is?

As the other replies stated, she is a Diamond Dove... probably a female if the store clerk is correct in stating that it does not make much noise. The males make a distinctive cooing call and have a tail fan dance they perform for mating. You don't usually see many of them in pet stores, but you might be able to find a mate or friend for your new bird at a feed store or a bird show. One thing to know about doves is that they do not crack seed like hookbills... they swallow the seed whole, so grit is needed. I supply my diamond doves with a little bowl of small grit and a cuttlebone. I feed them finch/parakeet feed. The dove feed is for the standard size dove and is too large for the small diamond dove. I occionally offer my doves fresh chopped fruits and veggies, but they don't eat too much of them... just occionally they will pick at the peas and chopped greens. Hope this helps and good luck with your new little dove! :)