API response to GetDetailedDescription contains AccommodationObject object, which has a property PriceListValidities. This is the list of all seasons for which that product has a price list. If you want to display all the price lists, you need to make one additional GetDetailedDescription request per season with the StartDate of the request’s parameter class set to the start date of the season for which you are fetching the price lists. That way, the response will contain the price list for the season whose starting date you have used for the request’s StartDate property.