Sacrament prayers
O God, the Eternal Father, we ask thee, in the name of thy Son, Jesus Christ, to bless and sanctify this water to the souls of all those who drink of it, that they may do it in remembrance of the blood of thy Son, which was shed for them; that they may witness unto thee, O God, the Eternal Father, that they do always remember him, that they may have his Spirit to be with them. Amen.
O God, the Eternal Father, we ask thee in the name of thy Son, Jesus Christ, to bless and sanctify this bread to the souls of all those who partake of it; that they may eat in remembrance of the body of thy Son, and witness unto thee, O God, the Eternal Father, that they are willing to take upon them the name of thy Son, and always remember him, and keep his commandments which he hath given them, that they may always have his Spirit to be with them. Amen.
This is the prayer I heard at my Sacrament meeting. I would think this same prayer is used at other LDS meeting.
You may have attended meetings using an other prayer.
Those are the correct prayers and they are said in every sacrement meeting with those exact words all over the world each Sunday in all wards and branches of the church.