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: I decided to purchase food from the fast food restaurant. Sentence2: The cashier handed my order when it was done. Sentence3: When I looked at my order, it was a cheeseburger instead of chicken. Sentence4: When the manager saw it, he realized that my order was wrong. Sentence5: They gave me a refund and provided the correct order to me.
I (myself), Manager, Cashier