Hi @Annette391 👋
I had a little search through the Help Center and came across this article: How Instant Book works. In particular it states:
"You can set your requirements to offer Instant Book only to guests who have a positive track record. That means they’ve completed at least one stay and haven’t received any negative reviews."
It's been a while since you posted, so I wondered how you got on with the Guest, if they stayed with you?
Looking forward to hearing from you. 🙂