[It is suggested that the dying person be given a Crucifix to hold or put it in a place where it can be easily seen. Christ's death opens the door to salvation. His sacrifice overcomes our sins."CCC1521 Union with the passion of Christ. By the grace of this sacrament the sick person receives the strength and the gift of uniting himself more closely to Christ's Passion: in a certain way he is consecrated to bear fruit by configuration to the Savior's redemptive Passion. Suffering, a consequence of original sin, acquires a new meaning; it becomes a participation in the saving work of Jesus."" If we have been united with him like this in his death, we will certainly also be united with him in his resurrection." Romans 6:5 NIV, NAB.]
LORD, have mercy on us.
Christ, have mercy on us.
Lord, have mercy on us.

Holy Mary, pray for him (her).

All the holy Angels and
Archangels,pray for him (her).
[Say "pray for him or her" after each saint. You could also personalize it by using the dying person's name, instead of the pronoun.]

Holy Abel,

All the Choirs of the Just,

Holy Abraham,

St. John the Baptist,

St. Joseph,

All the holy Patriarchs and Prophets,

St. Peter,

St. Paul,

St. Andrew,

St. John,

All the holy Evangelists,

All the holy Disciples of Lord,

All the holy Innocents,

St. Stephen,

St. Lawrence,

All the holy Martyrs,

St. Sylvester,

Apostles and the

St. Gregory,

St. Augustine,

All the holy Bishops and Confessors,

St. Benedict,

St. Francis,

St. Camillus,

St. John of God,

All the holy Monks and Hermits,

St. Mary Magdalen,

St. Lucy,

All the holy Virgins and Widows,

All the holy Saints of God, make intercession for him (her).

Be merciful, spare him (her), O Lord!

Be merciful, graciously hear him (her), 0 Lord!

[After each phrase say "O Lord deliver him (her).]

From your wrath,

From the peril of death,

From an evil death,

From the pains of hell,

From all evil,

From the power of the devil,

Through your Birth,

Through your Cross and Passion,

Through your Death and Burial,

Through your glorious Resurrection,

Through your admirable Ascension,

Through the grace of the Holy Spirit the Paraclete,

In the day of judgment, We sinners, we beseech you, hear us.

That you spare him (her), we beseech you, hear us.

Lord, have mercy on us.
Christ, have mercy on us.
Lord, have mercy on us.

Then while the soul is in agony of its departure, the Priest [or any person] recites the following prayer:

Go forth, O Christian soul, from this world, in the Name of God the Father Almighty, Who created you; in the Name of Jesus Christ, Son of the living God, Who suffered for you; in the Name of the Holy Spirit, Who was poured forth upon you; in the name of the Angels and Archangels; in the name of the Thrones and Dominations; in the name of the Principalities and Powers; in the name of the Cherubim and Seraphim; in the name of the Patriarchs and Prophets; in the name of the holy Apostles and Evangelists; in the name of the holy Martyrs and Confessors; in the name of the holy Monks and Hermits; in the name of the holy Virgins and of all the Saints of God: may your place be this day in peace, and your abode in holy Zion. Through the same Christ our Lord. R. Amen.

From The Key of Heaven, Regina Press NY, (1924) pp. 500-505. Imprimatur, Patrick Cardinal Hayes, Archbishop of New York, 1924