Who is Dinah from the memoir, Holidays on Ice?

Dinah is a prostitute, who works at the K&W cafeteria with David's sister, Lisa. On the night of Lisa's birthday, Dinah calls Lisa for help because her boyfriend has gotten drunk and mean. She dreams of staying clean and graduating from the cafeteria's steam counter to the meat-carving station. Grateful for the Sedaris family's attention, Dinah spends the evening of Lisa's birthday in their kitchen, telling stories, and enjoying their company.