@Antonella403
Your subject is in Spanish language, your posting is in Italian language and you are Portugese host on the English community...so that is really Multilingual ;>)
Google translates subject:
Cancel immediate reservation
If you want to deactivate "Instant Book" then follow these instructions:
https://www.airbnb.com/help/article/1510/how-do-i-turn-instant-book-on-or-off
Google translates posting:
How can I cancel an announcement?
Not clear to me what your question is, but if you want to deactivate your listing please read this:
https://www.airbnb.com/help/article/476/how-do-i-snooze-or-deactivate-my-listing
Hope this helps,
Emiel