There are several ways you can go with this. The book of Romans is more than adequate to share the plan of salvation. Below is an example of some verses that can be used to share the gospel.
All have sinned!
Romans 3:23
for all have sinned and fall short of the glory of God,
Sin has a cost, eternal separation from God. However, God has given us eternal life as a free gift!
Romans6:23
For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord.
God demonstrated His love for us, His enemies.
Romans5:8
But God demonstrates His own love toward us, in that while we were still sinners, Christ died for us.
We must trust and surrender to Jesus as Lord.
Romans 10:9-10
that if you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved. 10 For with the heart one believes unto righteousness, and with the mouth confession is made unto salvation.
Our assurance of salvation through Jesus
Romans 10:13
For “whoever calls on the name of the Lord shall be saved.”