Wedding ring fell into the defroster of our Trailblazer

I need to know how to get my wedding ring out of the dashboard of our 2003 Trailblazer.  It fell off and rolled into the front corner (up against the windshield) of the dashboard on the passenger side. Is this part of the defroster?   Is it possible that the ring fell out onto the road??  If not, how do I get to it???  Please help, I am distraught!
Thanks.