Originally Posted by Dave Noble

I don't see why any seats were allocated free of charge in advance. The passenger does not indicate having a requirement for disability assistance and if he did, would be ineligible for an exit seat anyway

Otherwise - If there are passengers under 12, then the airline will ensure that an under 12 is sat next to a adult

Beyond that, then seating would be a paid request ( unless on a fare that allows seat selection for free )