It is referred to as the Roman Missal or the sacramentary.
During the liturgy of the word you need to be listening to the priest/bishop or deacon because during this part of the mass we learn of redemption and salvation through the proclamation of the scriptures.
The prayers that the priest prays during a liturgical service are typically found in the missal, a book that contains the texts for the Mass and other sacraments. These prayers include the Eucharistic Prayer, the prayers of the faithful, and various collects and blessings. Additionally, specific prayers may be included in liturgical books relevant to particular seasons, feasts, or occasions. Overall, these texts guide the priest in leading the congregation in worship and supplication.
During the Liturgy of the Eucharist you need to response "Amen" after the priest finish the Eucharist Prayer
The priest consencrates the bread and wine.
Deacons and alter servers help the priest during the liturgy.
In a Catholic Mass, the order typically includes the Introductory Rites, Liturgy of the Word, Liturgy of the Eucharist, and Concluding Rites. The priest begins with greetings and prayers, followed by readings from the Bible, the Eucharistic prayers, consecration, and communion. The final rites conclude with a blessing and dismissal.
There are many prayers prayed by the priest during the Eucharist. I'm thinking that you are asking about a specific one, but this is just a guess. The Canon or Eucharistic Prayer is the central portion of the Eucharistic liturgy, it has eight parts: Preface, Acclamation, Epiclesis, Consecration, Anamnesis, Oblation, Intercessions, and Doxology.
A deacon at mass is a clergy member who assists the priest during the liturgy, such as proclaiming the Gospel, leading prayers, and assisting with the distribution of Holy Communion. Deacons may also be involved in other ministries within the church, such as serving the poor and marginalized in the community.
A Lavabo Bowl.
These are led by the priest in Church. Lay people do not lead prayers in Church. In some instances, such as during Vigil services, the priest will start the prayers, and then lay people continue to read them. But where a priest is present with lay people, only he can lead the prayers.
The lector reads from a book called the Lectionary which the priest also reads the gospel from. The book of prayers the priest reads from at the altar and chair is called the Roman Missal, or Sacramentary.
The Priest says, "The Lord be with you" during the Introduction rite and the Concluding rite.