This used to be a lovely feature in Airbnb in the US - I would receive the notification and part of the Inquiring Guest's message, or the Request to Book - and I could reply with the word ACCEPT or DECLINE, and it would puch that to the Airbnb platform - instantly accepting a reservaton Request to Book - or instantly sending my lengthy text reply to the person inquiring.
I have ONE ACCOUNT, but several listings fo rthe different configurations.
Now Airbnb sends me an auto-reply that Messaging is not supported (my carrier is Verizon and I use an iPhone 6). It is not repated to Carrier Data or Roaming or WiFi access, as I have al those fully enabled all the time. I have called and emailed and written Feedback to Airbnb about this "Lost Feature" that was so helpful. It TRULY helps the successful hosts to be SUPER-RESPONSIVE to our potential guests. Too bad this feature is now gone.....