@David6572 your question and the motivation for it are hard to understand. If you're asking how you can contact a guest you did not host, through Airbnb, you can't.
@David6572 Are you wanting to book a listing that has a review by a guest that makes it sound like the listing is a scam listing? Regardless, there is no way to contact that guest. Best to just move on and find another place.
...Or are you just saying that you were looking at reviews of a place and found a review that looked like it was written by a scammer? Also confused by your post. In any case, remember that only people that have actually rented a property can write a review of that property.