diff --git a/docs/en/samples/pre_post_processing/golden.txt b/docs/en/samples/pre_post_processing/golden.txt
index 532a72fade..5ee773d450 100644
--- a/docs/en/samples/pre_post_processing/golden.txt
+++ b/docs/en/samples/pre_post_processing/golden.txt
@@ -1,5 +1,4 @@
 Final Client Response:
 AI:
-Booking Confirmed
 Loyalty Points
-POLICY CHECK: Intercepting 'update-hotel'
+POLICY CHECK: Intercepting 'update-hotel'
\ No newline at end of file
diff --git a/docs/en/samples/pre_post_processing/python/langchain/agent.py b/docs/en/samples/pre_post_processing/python/langchain/agent.py
index b045e9af17..f6bd88cf5c 100644
--- a/docs/en/samples/pre_post_processing/python/langchain/agent.py
+++ b/docs/en/samples/pre_post_processing/python/langchain/agent.py
@@ -106,6 +106,14 @@ async def main():
         last_ai_msg = response["messages"][-1].content
         print(f"AI: {last_ai_msg}")
 
+        # Test Pre-processing
+        print("-" * 50)
+        user_input = "Update booking for hotel 3 with checkin 2025-01-01 and checkout 2025-01-20"
+        response = await agent.ainvoke(
+            {"messages": [{"role": "user", "content": user_input}]}
+        )
+        print(f"AI: {response['messages'][-1].content}")
+
 
 if __name__ == "__main__":
     asyncio.run(main())