7.4.1 airbnb may enable hosts to authorize other members -lrb- `` co-hosts '' -rrb- to administer the host 's listing -lrb- s -rrb- , and to bind the host and take certain actions in relation to the listing -lrb- s -rrb- as permitted by the host , such as accepting booking requests , messaging and welcoming guests , and updating the listing fee and calendar availability -lrb- collectively , `` co-host services '' -rrb- .