I'm not sure which specific 'a small favor real story' you are referring to. There could be many stories with this title. It could be about someone helping an old lady cross the street as a small favor. For example, a kind-hearted man saw an old woman struggling to cross a busy road and he took a few minutes out of his day to assist her. This simple act of kindness made the old lady's day easier.
Kindness would definitely be an element. For instance, someone offering to carry groceries for an elderly person. It's a simple act but full of kindness.
It's not a true story. Usually, such fictional works are crafted to entertain and engage the audience through creative plotlines and characters that aren't based on real-life events.