Here are some closing responses suitable for use in Advent worship. They come from the Church of England website.
Advent Dismissal
With love and compassion,
come, Lord Jesus.
With judgement and mercy,
come, Lord Jesus.
In power and glory,
come, Lord Jesus.
In wisdom and truth,
come, Lord Jesus.
—from Common Worship: Services and Prayers for the Church of England (2000), posted on the Church of England website.
For more worship resources for the season of Advent, see this index of Advent Worship Resources, or click on Advent 1, 2, 3, or 4 in the list of “Labels” at the lower right side of the page.
For other resources for the closing of worship, click on Benedictions in the list of “Labels” at the right, or see this Benediction index.