Fran is a waitress at Loyola's.
Better Call Saul
She serves Hector Salamanca coffee when he goes and sits down at Mike Ehrmantraut's booth. ("Rebecca")
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").