ask him/her
Si vous le voyez, demandez-lui s'il peut me louer son mulet.
If you see him, ask him if he can lend me his mule.
— Jean de Florette (1986)
Demandez-lui d'attendre que j'arrive.
Ask him to wait until I arrive.
Demandez-lui où il a garé sa voiture.
Ask him where he parked his car.
Ask him what he wants.
Quoi qu'il en soit, demandez-lui de m'appeler dès son retour.
In any case, ask him to call me as soon as he gets back.
— Bajrangi Bhaijaan (2015)