@Alicia787 : When we initially confirm a booking, we state that there will be a message sent 2-3 days prior to the guest's arrival. If the guest is new to Airbnb or has made a last minute reservation, we explain that we will be in communication frequently, so they should check their app regularly.
No matter the situation, a pre-arrival message is sent to confirm the details of the stay and ask any final questions we need to know in preparation for the visit a few days ahead of time. Should the client not respond by the day prior the visit, we send a reminder message/text explaining that we won't be able to proceed with the check-in information until we receive a response for the previous message. This normally results in a prompt, apologetic communication from the guest!