Booking functionality is built into theme and does not need Dokan. 

Click on an image below to zoom booking workflow or or click here to open it in a new tab

Listeo has also additional booking feature: extra paid services in booking →

Extra Services

Extra services are integrated with pricing table on listing page. Items in pricing table can be set as bookable options in booking widget.

You can check it there: https://listeo.pro/listing/sunny-apartment/

Pricing table can be hidden from the listing description without disabling extra services from booking widget.