Fran is a waitress at a diner.
Better Call Saul
Fran also has a brief conversation with Mike while serving him at the diner before Mike meets up with Nacho. ("Nailed").
Fran served Lydia Rodarte-Quayle and Mike Ehrmantraut when they met at her diner to discuss the loyalty of Gustavo Fring's former employees. She seemed to know Mike as a regular customer ("Madrigal").