diff --git a/hotel_reservation/models/hotel_reservation.py b/hotel_reservation/models/hotel_reservation.py
index 3a5491d..af0a63b 100644
--- a/hotel_reservation/models/hotel_reservation.py
+++ b/hotel_reservation/models/hotel_reservation.py
@@ -318,8 +318,8 @@ def set_to_draft_reservation(self):
         for reservation in self:
             reservation.write({'state':'draft'})
             # Deleting the existing instance of workflow for PO
-            self.delete_workflow(cr, uid, [reservation.id])
-            self.create_workflow(cr, uid, [reservation.id])
+            reservation.delete_workflow()
+            reservation.create_workflow()
         return True
 
     @api.multi