In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.

Title: Sally Tips Her Waiter. Sentence 1: Sally was having lunch by herself at an Italian restaurant. Sentence 2: She overheard her waiter having money problems. Sentence 3: Sally felt very bad for her waiter. Sentence 4: After her meal, Sally tipped her $100.
The waiter was very grateful for the tip.