Pray that God would remove Satan’s blinding influence.

Unbelievers have been blinded by Satan and will only ever be able to see and appreciate the gospel if God works within them. So pray that God would give them sight — spiritual sight.
Pray that God would grant them repentance.

You never know how or when God might sober them up with a change of heart and a turning to the truth, enabling them to escape the Devil’s trap, where they are caught and held captive, forced to run his errands.. . . . . 2 Timothy 2:25-26(The Message)
Unbelievers cannot repent without the enabling grace of God. So pray that God would grant them repentance, that this repentance would lead them to a knowledge of the truth. Pray as well that they would come to their senses and that they would escape from the devil’s snare.
Pray that God would put Christians in their path.

For people to be saved they must first hear the good news of the gospel. For them to hear the good news of the gospel, they must first encounter Christians — Christians like you. If you can witness to them do so, if you can't or they will not accept it from you, pray that God puts a Christian in their life, someone significant who they can respect and to whom they will listen.