Gamertag Asistic

Anyone have this gamer tag Asistic.. its been my name for everything in gaming for 10 years and I made it up but as soon as I changed my gamertag now for a couple weeks it was taken right away and doesn't make any sense at all.

Wait asistic was taken?
If so who cares? And why would change it in the first place then..

I haven't seen this gamertag around anywhere,Best bet is to to message they tag and find out who owns it.