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: On a very hot day, Steve was outside with his dog when his phone rang. Sentence2: A friend urgently needed him, and Steve jumped in his car to go help. Sentence3: He texted his wife to let the dog in and spent hours with his friend. Sentence4: Coming home, he was horrified to see his dog motionless in the dirt. Sentence5: His wife never got the text, and trapped outside, the dog had died.
Steve, His dog, His friend, His wife