diff --git a/apps/booking/views.py b/apps/booking/views.py
index 73f6f55e..c2a143a6 100644
--- a/apps/booking/views.py
+++ b/apps/booking/views.py
@@ -84,8 +84,8 @@ class CheckWhetherBookingAvailable(generics.GenericAPIView):
 
         service_response = self._preprocess_guestonline_response(service.response) \
             if establishment.guestonline_id is not None \
-            else service.response
-        response.update({'details': service_response} if service and service.response else {})
+            else service.response if service else None
+        response.update({'details': service_response})
         return Response(data=response, status=200)