diff --git a/src/main.py b/src/main.py
index 0d6d7cd..3a505a5 100644
--- a/src/main.py
+++ b/src/main.py
@@ -32,7 +32,7 @@ while True:
         monitor.update(frame)
 
         # DP
-        # print(dialog_policy.next_dialogue_act(monitor.read()).act)
+        system_action = dialog_policy.predict(monitor)
 
         # NLG
         act, slots = parse_frame(frame)
diff --git a/src/service/dialog_policy.py b/src/service/dialog_policy.py
index ee9d29c..13812a1 100644
--- a/src/service/dialog_policy.py
+++ b/src/service/dialog_policy.py
@@ -1,8 +1,34 @@
+from collections import defaultdict
 from model.frame import Frame
+from src.model.slot import Slot
 
 class DialogPolicy:
-    def next_dialogue_act(self, frames: list[Frame]) -> Frame:
-        if frames[-1].act == "welcomemsg":
-            return Frame("system", "welcomemsg", [])
-        else:
-            return Frame("system", "canthelp", [])
+    
+    def predict(self, dsm):
+        system_action = defaultdict(list)
+        last_frame = dsm.state['history'][-1]
+        if(dsm.was_previous_order_invalid==False):
+            match(last_frame.act.strip('/')):
+                case "inform" | "affirm":
+                    current_active_status = dsm.get_current_active_stage()
+                    match(current_active_status):
+                        case "collect_food":
+                            system_action["inform"].append([Slot("menu", dsm.constants['menu'])])
+                        case "collect_drinks":
+                            system_action["inform"].append([Slot("drink"), dsm.constants['drink']])
+                        case "collect_address":
+                            system_action["request"].append([Slot("address")])
+                    if(current_active_status == None):
+                        system_action["inform"].append([Slot("order"), dsm.belief_state])
+                case "request":
+                    for slot in last_frame.slots:
+                        system_action["inform"].append([Slot(slot), dsm.constants[slot]])
+                case "welcomemsg":
+                    system_action["inform"].append([Slot("menu"), dsm.constants['menu']])
+                case "bye":
+                    system_action["bye"].append([], None) 
+                case "negate":
+                    system_action["affirm"].append([], None) 
+
+        return system_action
+