diff --git a/src/service/dialog_state_monitor.py b/src/service/dialog_state_monitor.py
index aba0ad6..6b2fb84 100644
--- a/src/service/dialog_state_monitor.py
+++ b/src/service/dialog_state_monitor.py
@@ -156,13 +156,10 @@ class DialogStateMonitor:
                         new_order[slot.name] = [{"drink": value}]
                 
                 elif slot.name in ["ingredient", "ingredient/neg"]:
-                    if len(self.state['belief_state']['order']) != 0:
-                        last_order = self.state['belief_state']['order'][-1]
-                        if last_order["name"] == "pizza":
-                            last_order[slot.name].append(value)
-                        elif last_order["name"] == "drink":
-                            last_order[slot.name].append(value)
-
+                    pizzas_list = new_order.get("pizza")
+                    if pizzas_list:
+                        pizzas_list[-1][slot.name].append(value)
+                    
             if len(new_order) > 0:
                 self.state['belief_state']['order'].append(new_order)
             self.complete_stage_if_valid('collect_food')