getServiceAvailability on specific service

I have created a simple booking website using wix-booking which allows clients to make their appointments through the page, they can choose the day and time of the service depending on availability. I have created an app for that website and trying to obtain the availability of a specific service in json format and I cannot find a way to do it. I already exposed the site to accept http-request and through export function get_services (request) I can get the list of services but I can’t get the availability of a specific service (the hours and days available in json format)

import wixBookings from 'wix-bookings';
import {ok, notFound, serverError} from 'wix-http-functions';
import wixData from 'wix-data';

export function get_services(request) {
 let options = {
 "headers": {
 "Content-Type": "application/json"
    }
  };
 // query a collection to find matching items
 return wixData.query("Bookings/Services")
    .find()
    .then( (results) => {
 // matching items were found
 if(results.items.length > 0) {
        options.body = {
 "items": results.items
        };
 return ok(options);
      }
 // no matching items found
      options.body = {
 "error": `'${request.path[0]} ${request.path[1]}' was not found`
      };
 return notFound(options);
    } )
 // something went wrong
    .catch( (error) => {
      options.body = {
 "error": error
      };
 return serverError(options);
    } );
}