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: For Years Charles wanted a job selling technology. Sentence2: A company hired him three months ago to sell online marketing plans. Sentence3: Charles burned out quickly and was demoted to another department. Sentence4: He made two sales last week, the minimum to keep his position. Sentence5: But one customer canceled so Charles was fired for not enough sales.
A:
Customer, Charles