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: Robbie was the new bartender at the club. Sentence2: One night he over served a customer. Sentence3: The customer became intoxicated. Sentence4: He started a fight and hurt another customer. Sentence5: Robbie got fired because of his carelessness.
A:
A customer, Robbie, Another customer