Laravel whereHas not between or doesn't exsists

I have to write query where I need to get salons where there is no reservations so I am writing this:

Salon::whereHas('reservationsSalons', function($q) {
    $q->whereNotBetween('start_time', [request()->start_time, request()->end_time]);
})
->get();

But the problem is I am not getting salons where there is no reservations. So I need something like

->orwhereNotHas('reservationsSalons')

via Chebli Mohamed