@Michele1897 you can inform Airbnb support about the situation that your guest is not responsive and never checked in. Ensure you have a record of all the attempts you've made to contact the guest, including the messages sent through the Airbnb platform. Airbnb will likely guide you on the next steps. They may attempt to contact the guest on your behalf, and they will inform you about policies regarding cancellations and refunds in such scenarios. Your cancellation policy will still stand in these kinds of cases. Hope this helps!