The Ending was very sad.....
Iris dresses up in her "power suit" that her dad had bought for her on clearance. She typed up a recommendation letter to have signed by one of the managers in the office. She told him it was her last day & she wanted him to sign it. I understand all of that...but it really wasn't her last day there was it? It showed her scratching the "never" off of the "I was here" scratch mark left on the desk. Basically, she knew that the manager didn't even know who she was by him dismissing her on the street so she dressed up to get his signature for Margaret because she knew he didn't have a clue who she was or who Margaret was.
Sad movie in my opinion, but true to life. We go through life working with people(temp's, etc...) not knowing them or even trying to know them.