Ron Lydick, the local McDonald’s owner-operator, gifts LouAnn Lindie with a McDonald’s jacket Tuesday to celebrate her 50th work anniversary at the Main Street McDonald’s in Waterville. (Anna Chadwick/Staff Photographer)Dawn DiBlasi marched into the McDonald’s restaurant on Main Street in Waterville 50 years ago and demanded to see the manager. DiBlasi, 64, worked there seven years, but LouAnn, now LouAnn Lindie, stayed longer. Serving customers was a lot different at McDonald’s 50 years ago, Lindie said. Her sister, DiBlasi, insisted McDonald’s is lucky to have had her for 50 years.