diff --git a/dialogue_simulator.py b/dialogue_simulator.py
index 214458a3..cbbb3f5a 100644
--- a/dialogue_simulator.py
+++ b/dialogue_simulator.py
@@ -12,7 +12,7 @@ max_iters = 6
 n = 0
 
 while n < max_iters:
-    name, message = simulator.step()
+    name, message = collab.step()
     print(f"({name}): {message}")
     print("\n")
     n += 1
\ No newline at end of file