Note: Request to Book is not available for Hosts located in the UK and EU. Properties located in the UK and EU will only have the Instant Book option.
In your Host Dashboard under the "Property" tab, there is a section called "Booking options."
Here you can change the bookability of a site to either Request to Book or Instant Book by using the drop-down menu below "Bookability." Click "Save your changes" to save any changes you have made.