What if that person chooses not to repent?
First we are granted repentance, it's not something we "do" in that way.
Acts 5:31
"He is the one whom God exalted to His right hand as a Prince and a Savior, to grant repentance to Israel, and forgiveness of sins.
Acts 11:18
When they heard this, they quieted down and glorified God, saying, "Well then, God has granted to the Gentiles also the repentance that leads to life."
2 Timothy 2:25
with gentleness correcting those who are in opposition, if perhaps God may grant them repentance leading to the knowledge of the truth,
Romans 2:4
Or do you think lightly of the riches of His kindness and tolerance and patience, not knowing that the kindness of God leads you to repentance?
2 Peter 3:9
The Lord is not slow about His promise, as some count slowness, but is patient toward you, not wishing for any to perish but for all to come to repentance.
It's a gift, and if you haven't repented then you haven't been born again, according to Jesus anyway. Also John 6:39
And this is the will of Him who sent Me, that I shall lose none of those He has given Me, but raise them up at the last day.
and 10-29
My Father, who has given them to me, is greater than all, and no one is able to snatch them out of the Father’s hand.
I think these uses of "no one" include ourselves. We don't create ourselves, we don't save ourselves, we also don't have the power to choose who God saves and doesn't, including ourselves. That and I know how I feel and any believer around will testify they could never turn away. Even when I believed we could turn from Him because free will, but always had to add how "I could never imagine turning away, but what does God do? Make us slaves?". Funny thing about that is we are told we will be slaves of sin or slaves of Christ right?
Anyway thought these were relevant to the conversation.