A human being cannot convince someone to be saved any more than you can convince a corpse to rise up, walk, and live! The corpse cares nothing for steak, and without the Holy Spirit giving grace, a human cares nothing for Truth or goodness.

Even the good seen in unbelievers is only there because God gives them common grace!

What you can do is this. Pray for the person. You can also set a banquet table (offer the Gospel, and truth) and invite those corpses to come and eat. But God has to give those corpses the grace to even walk in the first place.