In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.
Q: Sentence1: Travis was an avid skateboarder. Sentence2: One night, his hobby became quite expensive. Sentence3: Overconfident, he attempted a risky trick. Sentence4: He fell and broke his arm so badly it needed surgery. Sentence5: The hospital bill was over forty thousand dollars.
A:
Travis