Answer:
The chosen event is a themed book fair.
"There will be a book fair next week in the parking lot of the city's shopping mall. I'm telling you about this event, because you're always reading a book and I thought you might like it. This fair is themed, I don't know what the theme, but there may be interesting things, no? the event will be in the afternoon, we could go together if you don't mind. "
Step-by-step explanation:
When you want to inform another person about an event that you don't have a lot of information about, you should talk about that event in a generic and simplified way, without giving details that you don't know, to avoid concealing wrong and false information. An example of this can be seen in the passage above, where the narrator talks about a book fair in a very simple and generic way, speaking only the facts that he really knows.