Photographer not emailing back

Hi everyone! I need some advice. Me and my fiancé were at a bridal show a few months back and won a free engagement session with a photographer we liked. We emailed back and forth and he said the next step would be to choose which season we would like our session and we told him We would like fall photos. He told us it was a very busy time of year for him but we’d look into a date when we got closer to fall. This was back in May/June. So fast forward to last month and I emailed him back to touch base and see when he was available and he has yet to respond. I want to email him a second time but I don’t know what to say that won’t come off as rude or pushy! But I would like to know if this is something he still has time for or not so I know if I need to look for someone else! Help!