This chant is used for general intercessions in Advent, and it came up for that purpose at one of Chris’s parishes. It is by Gabe Huck. Hymnary have information on the piece and it can purchased as part of a collection at GIA. It is a call and response by the cantor and assembly before and after each prayer.
I found an interesting article about Gabe Huck from a critic and reading against the grain of the condemnation there appears much to admire. Oddly his biographer page appears blank in the usual places.
My backing runs the whole thing together but there is meant to be a gap in the middle for each intercession. So for learning purposes only: