Jenny Slate and Abby Quinn appear in ‘Landline’ by Gillian Robespierre, an official selection of the U.S. Dramatic Competition at the 2017 Sundance Film Festival. Jenny Slate and Abby Quinn appear in ‘Landline’ by Gillian Robespierre, an official selection of the U.S. Dramatic Competition at the 2017 Sundance Film Festival.