The Helpline by Katherine Collette

When Germaine is fired from her position at an insurance company, she gets a job answering phones for the Senior Citizens Helpline for the local council. With a passion for numbers and a tendency to view situations in a mathematical fashion, Germaine is not the most sympathetic person for the job. When the mayor recruits her to help get the senior citizen center shut down, Germaine readily agrees, since her longtime crush, Sudoku champion Don, is part of the team to make it happen. However, Germaine finds herself warming to some of the people on the helpline and realizes the mayor might not really be a friend at all. The Helpline takes the reader on Germaine's journey of self-discovery. A great read-alike for The Rosie Project.