I could be wrong, but to me it looks like a fairly standard white NoID Phal. Especially if he couldn't give you a name.
Bear in mind that even if it does have a name it could be a hybrid not a species. A NoID is simply an orchid with no identification so if you weren't given a name then it is a NoID.
There are hundreds of registered phalaenopsis hybrids as well as all the species and if it originally had a name it could be that many of them look pretty similar so would be very difficult to say which it was even if you were 100% sure it had a registered name.
On top of that there are probably thousands of unregistered hybrids. Ones which have been bred and never given a name, possible not even had their parents recorded when they were bred in the mass market (or bred from ones also not registered). There are soooo many of these that you are almost guaranteed to get look alikes, which also look alike with registered ones but actually have different genetics.
So, unless someone recognizes that this is the white species which is the parent of many of the white hybrids, or unless the shop can actually give you the name, then it's very unlikely you will ever get a name. (I don't know the fine details of the species gives a lot of the look to the standard white phal hybrids, I'm just aware there is one).
But don't worry about that... they are just as pretty and worth saving without a name as with one
Most of my Phals don't have names.