diff --git a/src/Infrastructure/BotSharp.Core/Routing/Prompts/router_prompt.liquid b/src/Infrastructure/BotSharp.Core/Routing/Prompts/router_prompt.liquid
index e118dd71..83a743d6 100644
--- a/src/Infrastructure/BotSharp.Core/Routing/Prompts/router_prompt.liquid
+++ b/src/Infrastructure/BotSharp.Core/Routing/Prompts/router_prompt.liquid
@@ -26,6 +26,6 @@ Reach out to a real customer representative to help.
 {{ reasoning_functions }}
 
 ### Your response must meet below requirements strictly
-* If you can find an appropriate Agent, you must call appropriate function with required arguments.
+* If you can find an appropriate Agent, you must call function route_to_agent with required arguments.
 
 ### Below are the dialogs between user and different agents:
\ No newline at end of file
diff --git a/src/WebStarter/data/agents/c2b57a74-ae4e-4c81-b3ad-9ac5bff982bd/instruction.liquid b/src/WebStarter/data/agents/c2b57a74-ae4e-4c81-b3ad-9ac5bff982bd/instruction.liquid
index 6368d9b4..eacd4dc1 100644
--- a/src/WebStarter/data/agents/c2b57a74-ae4e-4c81-b3ad-9ac5bff982bd/instruction.liquid
+++ b/src/WebStarter/data/agents/c2b57a74-ae4e-4c81-b3ad-9ac5bff982bd/instruction.liquid
@@ -4,6 +4,7 @@ Follow below step to place order:
 1: Ask user preferences.
 2: Confirm with user the pizza type and quantity.
 3: Call function place_an_order to purchase.
+4: Proceed to make payment for this order.
 
 Use below information to help ordering process:
 * Today is {{current_date}}, the time now is {{current_time}}, day of week is {{current_weekday}}.
\ No newline at end of file
diff --git a/src/WebStarter/data/agents/fe8c60aa-b114-4ef3-93cb-a8efeac80f75/agent.json b/src/WebStarter/data/agents/fe8c60aa-b114-4ef3-93cb-a8efeac80f75/agent.json
index 352c3ea7..72959d11 100644
--- a/src/WebStarter/data/agents/fe8c60aa-b114-4ef3-93cb-a8efeac80f75/agent.json
+++ b/src/WebStarter/data/agents/fe8c60aa-b114-4ef3-93cb-a8efeac80f75/agent.json
@@ -1,15 +1,15 @@
 {
   "name": "Payment",
-  "description": "Make payment when user placed new order.",
+  "description": "Make payment when user placed new order and system returned the order number.",
   "createdDateTime": "2023-07-26T02:29:25.123224Z",
   "updatedDateTime": "2023-07-26T02:29:25.123274Z",
-  "id": "c2b57a74-ae4e-4c81-b3ad-9ac5bff982bd",
+  "id": "fe8c60aa-b114-4ef3-93cb-a8efeac80f75",
   "allowRouting": true,
   "routingRules": [
     {
       "field": "order_number",
       "required": true,
-      "redirectTo": "ff431273-0c28-4647-88bf-86d82443c579"
+      "redirectTo": "c2b57a74-ae4e-4c81-b3ad-9ac5bff982bd"
     }
   ]
 }
\ No newline at end of file
diff --git a/src/WebStarter/data/agents/fe8c60aa-b114-4ef3-93cb-a8efeac80f75/functions.json b/src/WebStarter/data/agents/fe8c60aa-b114-4ef3-93cb-a8efeac80f75/functions.json
index 34818014..b9219dfe 100644
--- a/src/WebStarter/data/agents/fe8c60aa-b114-4ef3-93cb-a8efeac80f75/functions.json
+++ b/src/WebStarter/data/agents/fe8c60aa-b114-4ef3-93cb-a8efeac80f75/functions.json
@@ -1,16 +1,20 @@
 [  
     {
         "name": "make_payment",
-        "description": "call this function to make payment",
+        "description": "call this function to make payment after system returned the order number",
         "parameters": {
             "type": "object",
             "properties": {
                 "order_number": {
                   "type": "string",
                   "description": "order number."
+                },
+                "total_amount": {
+                    "type": "string",
+                    "description": "total amount."
                 }
             },
-            "required": ["order_number"]
+            "required": ["order_number", "total_amount"]
         }
     }
 ]
diff --git a/tests/BotSharp.Plugin.PizzaBot/Functions/MakePaymentFn.cs b/tests/BotSharp.Plugin.PizzaBot/Functions/MakePaymentFn.cs
new file mode 100644
index 00000000..16c1e9ef
--- /dev/null
+++ b/tests/BotSharp.Plugin.PizzaBot/Functions/MakePaymentFn.cs
@@ -0,0 +1,19 @@
+using BotSharp.Abstraction.Conversations.Models;
+
+namespace BotSharp.Plugin.PizzaBot.Functions;
+
+public class MakePaymentFn : IFunctionCallback
+{
+    public string Name => "make_payment";
+
+    public async Task<bool> Execute(RoleDialogModel message)
+    {
+        message.ExecutionResult = "Payment proceed successfully. Thank you for your business. Have a great day!";
+        message.ExecutionData = new
+        {
+            Transaction = Guid.NewGuid().ToString(),
+            Status = "Success"
+        };
+        return true;
+    }
+}
diff --git a/tests/BotSharp.Plugin.PizzaBot/PizzaBotPlugin.cs b/tests/BotSharp.Plugin.PizzaBot/PizzaBotPlugin.cs
index 1cc5ac5c..bc106e70 100644
--- a/tests/BotSharp.Plugin.PizzaBot/PizzaBotPlugin.cs
+++ b/tests/BotSharp.Plugin.PizzaBot/PizzaBotPlugin.cs
@@ -13,6 +13,7 @@ public class PizzaBotPlugin : IBotSharpPlugin
         services.AddScoped<IFunctionCallback, PlaceOrderFn>();
         services.AddScoped<IFunctionCallback, OrderFoundFn>();
         services.AddScoped<IFunctionCallback, GetDeliveryTimeFn>();
+        services.AddScoped<IFunctionCallback, MakePaymentFn>();
 
         // Register hooks
         services.AddScoped<IAgentHook, PizzaBotAgentHook>();