How can i get available booking dates by sevrice_id with Zoho API

How can i get available booking dates by sevrice_id with Zoho API

I do this:

curl --location --request GET 'https://www.zohoapis.eu/bookings/v1/json/availableslots?service_id=123&staff_id=123&selected_date=30-Apr-2020%10:00:00' \
--header 'Authorization: Zoho-oauthtoken 123'

and get available time slots for selected day.

I need to get available dates by service_id

example:

curl --location --request GET 'https://www.zohoapis.eu/bookings/v1/json/availableslots?service_id=123&staff_id=123' \
--header 'Authorization: Zoho-oauthtoken 123'

response:

{
  "response": {
    "returnvalue": {
      "reponse": true,
      "data": [
        "30-Nov-2021",
        "31-Nov-2021",
...

How can i do it?