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: Cathy recently took a trip to the Bahamas. Sentence2: While in the Bahamas, Cathy decided to swim with dolphins. Sentence3: Cathy was scared that the dolphins would attack her. Sentence4: However, Cathy was surprised at how docile the dolphins were. Sentence5: Cathy was so glad she took the chance to swim with the dolphins.
A:
Cathy, Dolphins