Improve TokenStatistics.

src/Infrastructure/BotSharp.Abstraction/Functions/Models/FunctionCallFromLlm.cs

@@ -5,18 +5,9 @@ namespace BotSharp.Abstraction.Functions.Models;
 
 public class FunctionCallFromLlm : RoutingArgs
 {
-    [JsonPropertyName("function")]
-    public string Function { get; set; } = string.Empty;
-
-    [JsonPropertyName("reason")]
-    public string Reason { get; set; } = string.Empty;
-
     [JsonPropertyName("question")]
     public string? Question { get; set; }
 
-    [JsonPropertyName("answer")]
-    public string Answer { get; set; } = string.Empty;
-
     [JsonPropertyName("args")]
     public JsonDocument Arguments { get; set; } = JsonDocument.Parse("{}");
 

src/Infrastructure/BotSharp.Abstraction/Routing/Models/RoutingArgs.cs

@@ -2,11 +2,29 @@ namespace BotSharp.Abstraction.Routing.Models;
 
 public class RoutingArgs
 {
+    [JsonPropertyName("function")]
+    public string Function { get; set; } = string.Empty;
+
+    [JsonPropertyName("reason")]
+    public string Reason { get; set; } = string.Empty;
+
+    [JsonPropertyName("answer")]
+    public string Answer { get; set; } = string.Empty;
+
     [JsonPropertyName("agent")]
     public string AgentName { get; set; } = string.Empty;
 
     public override string ToString()
     {
-        return AgentName;
+        var route = string.IsNullOrEmpty(AgentName) ? "" : $"<Route to {AgentName.ToUpper()} because {Reason}>";
+
+        if (string.IsNullOrEmpty(Answer))
+        {
+            return $"[{Function} {route}]";
+        }
+        else
+        {
+            return $"[{Function} {route}] => {Answer}";
+        }
     }
 }

src/Infrastructure/BotSharp.Core/Conversations/Services/TokenStatistics.cs

@@ -51,7 +51,7 @@ public class TokenStatistics : ITokenStatistics
 
     public void PrintStatistics()
     {
-        var stats = $"Token Usage: {_promptTokenCount} prompt + {_completionTokenCount} completion = {Total} total (${Cost:C4}), accumulated cost: ${AccumulatedCost:C4}, model: ${_model}";
+        var stats = $"Token Usage: {_promptTokenCount} prompt + {_completionTokenCount} completion = {Total} total tokens. One-Way cost: ${Cost:C4}, accumulated cost: ${AccumulatedCost:C4}. Model: {_model}";
 #if DEBUG
         Console.WriteLine(stats, Color.DarkGray);
 #else

src/Infrastructure/BotSharp.Core/Routing/Handlers/ResponseToUserRoutingHandler.cs

@@ -9,7 +9,7 @@ public class ResponseToUserRoutingHandler : RoutingHandlerBase, IRoutingHandler
 {
     public string Name => "response_to_user";
 
-    public string Description => "You know how to response according to the context, don't need to ask specific agent.";
+    public string Description => "You know how to response according to the context without asking specific agent. For example user greeting.";
 
     public List<NameDesc> Parameters => new List<NameDesc>
     {

src/Infrastructure/BotSharp.Core/Routing/Handlers/RoutingHandlerBase.cs

@@ -1,5 +1,6 @@
 using BotSharp.Abstraction.Agents.Models;
 using BotSharp.Abstraction.Functions.Models;
+using BotSharp.Abstraction.Routing.Models;
 using BotSharp.Abstraction.Routing.Settings;
 using BotSharp.Abstraction.Templating;
 using System.Drawing;
@@ -37,7 +38,12 @@ public abstract class RoutingHandlerBase
 
     public async Task<FunctionCallFromLlm> GetNextInstructionFromReasoner(string prompt)
     {
-        var responseFormat = JsonSerializer.Serialize(new FunctionCallFromLlm());
+        var responseFormat = _settings.EnableReasoning ?
+            JsonSerializer.Serialize(new FunctionCallFromLlm()) :
+            JsonSerializer.Serialize(new RoutingArgs
+            {
+                Function = "route_to_agent"
+            });
         var content = $"{prompt} Response must be in JSON format {responseFormat}";
 
         var chatCompletion = CompletionProvider.GetChatCompletion(_services,

src/Infrastructure/BotSharp.Core/Routing/RoutingService.cs

@@ -81,7 +81,8 @@ public class RoutingService : IRoutingService
         {
             loopCount++;
 
-            var inst = await handler.GetNextInstructionFromReasoner($"Tell me the next step?");
+            var prompt = _settings.EnableReasoning ? "Tell me the next step?" : "Which agent is suitable to handle user's request?";
+            var inst = await handler.GetNextInstructionFromReasoner(prompt);
             inst.Question = inst.Question ?? message;
 
             handler = handlers.FirstOrDefault(x => x.Name == inst.Function);