Hi @Sarah977,
I had 2 of such weird messages, about 2 years ago (both of them, on the same day).
The message was of type: “Message” opposed to “Inquiry”, “Booking Request” or “Reservation”.
One of the messages was completely blank, and the other said: “Sorry, wanted to book your place. But just realized it is not available for the dates, we require”.
Both of them, did not contain any dates.
And I could only reply (no further buttons).
So, I just replied and never heard anything back anymore.
And yes, you never know, what’s the next thing on Airbnb’s sleeve again 😄
Back then, I thought it was just another glitch.