Catechism of the Catholic Church §2671 — excerpt
The traditional form of petition to the Holy Spirit is to invoke the Father through Christ our Lord to give us the Consoler Spirit. Jesus insists on this petition to be made in his name at the very moment when he promises the gift of the Spirit of Truth.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.
Also cites: Roman Missal, Pentecost Sequence · Byzantine Liturgy, Pentecost Vespers, Troparion