How about this Steve. You will within 24 hours of reading this remember something of your childhood that relates to your dream, perhaps a part of the dream that you didn't tell anybody.
I know the person is from a past life. I don't know how I know I just know. What does it matter anyway how I know. Some animals, insects included, have incredible instincts, they don't know how they know either. If an animal can do it why not a human being?
I'm not Steve but this brought to mind the thought that one of the ways that we, human beings, differ from animals who like us, can have highly developed instincts, is that we have imagination at our disposal to escape reality. We intentionally and unintentionally dwell in daydreams, imagining all sorts of scenarios for ourselves... An interesting tendency that is fruitful to observe and hopefully learn from.