Given the task definition and input, reply with output. 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: Kelly was excited to check out the new restaurant in town. Sentence2: She made reservations for her and a friend for that evening. Sentence3: When they got to the restaurant they waited a long time for a table. Sentence4: The waitress mixed up their orders and brought them the wrong dinners. Sentence5: Kelly decided not to eat at that restaurant again.
Kelly, Friend, Waitress