Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: Chuck and Haley were about to see their first concert together. Sentence 2: They were in line when Haley decided to double check on the tickets. Sentence 3: To her panic, she realized that one of the tickets was missing. Sentence 4: They searched all over the building for the ticket. Sentence 5: Soon the show had started and it was too late to keep looking.

The Lost Ticket