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.

Sentence1: Denise decided she wanted to have some fun at the casino. Sentence2: Her favorite activity at the casino was the slots. Sentence3: As soon as she arrived she made her way to some fun slots. Sentence4: After playing for an hour, she finally won a thousand dollars. Sentence5: At the end of the day she was thrilled.
Denise