@Nevena3, You could snooze your listing if you are going to be without access for more than 24 hours. When you snooze, your listing will not appear in search result so no new bookings, requests, or inquiries will come through. If snoozed for a short period of time this will likely have a very little effect on your bookings.
Also, keep in mind that it is not necessary to respond to an instant booking. In my opinion, great hosts respond immediately to acknowledge the booking, but there are tons and tons who don't. You can have an instant book come through and not message the guest for a few days. It is not always expected and that is the beauty of it. The problem will be if you have a request to book or an inquiry that you cannot get to within 24 hours. If you think this will be the case, then I would definitely snooze your listing.