@Diane1169 What's wrong with the review? Why would you interpret it to mean they didn't enjoy their stay? Seems quite strange to me you would ask a guest what was wrong if they left a positive review like that, and I would find it very odd if I got a message from a host like that when I hadn't made any complaints.
And leaving the response you did is not appropriate. A response is not where you directly ask the reviewer something. Responses appear on your review pages, not the guest's, and are used to correct misleading statements, apologize for a legitimate issue a guest mentioned in the review, and to indicate that any issues have been corrected. This is all for the benefit of future guests who are looking at your review pages.
Not everyone is into waxing effusively about where they stayed. You should be grateful they took the time to leave a positive review.
What you got was what I refer to as an "objective" review. Many guests leave objective reviews as opposed to subjective ones detailing everything they loved about their stay. They might say "Good water pressure, comfortable bed, convenient location to public transport." They are just giving straightforward information.
An objective positive review is fine, even if you prefer to get lots of praise.