A young man worked at Dina's Coffee Shop and served Desmond coffee. Because Desmond didn't have U.S. dollars in his pocket, Libby offered to pay for the coffee. That's how they met. ("Live Together, Die Alone, Part 1")
- On the IMDb he is credited as 'Barista' 
- A barista (from the Italian for "bartender") is a person, usually a coffee-house employee, who prepares and serves espresso-based coffee drinks.