Right now American seats basic economy in the middle seats and main in isle or windows. The system will try and seat family’s together if they are on the same r

Right now American seats basic economy in the middle seats and main in isle or windows. The system will try and seat family’s together if they are on the same reservation and the kids are under 15. So you’re best to pay for seats if you want to be together. However, if you pay for seats and they change your flight on you, those seats are ‘lost and you need to call for a refund.