Supports allow to interrupt the welcome message playing

src/Plugins/BotSharp.Plugin.Twilio/Controllers/TwilioOutboundController.cs

@@ -53,7 +53,15 @@ await HookEmitter.Emit<ITwilioCallStatusHook>(_services,
             {
                 instruction.SpeechPaths.Add(request.InitAudioFile);
             }
-            response = twilio.ReturnNoninterruptedInstructions(instruction);
+
+            if (request.WelcomeMessageAllowToBeInterrupted.HasValue && request.WelcomeMessageAllowToBeInterrupted.Value)
+            {
+                response = twilio.ReturnInstructions(instruction);
+            }
+            else
+            {
+                response = twilio.ReturnNoninterruptedInstructions(instruction);
+            }
         }
 
         return TwiML(response);

src/Plugins/BotSharp.Plugin.Twilio/Models/ConversationalVoiceRequest.cs

@@ -42,6 +42,9 @@ public class ConversationalVoiceRequest : VoiceRequest
     [FromForm]
     public int MachineDetectionDuration { get; set; }
 
+    [FromQuery(Name = "welcome_msg_allow_interrupt")]
+    public bool? WelcomeMessageAllowToBeInterrupted { get; set; }
+
     [FromForm]
     public int CallDuration { get; set; }
 

src/Plugins/BotSharp.Plugin.Twilio/OutboundPhoneCallHandler/Functions/OutboundPhoneCallFn.cs

@@ -25,6 +25,7 @@ public class OutboundPhoneCallFn : IFunctionCallback
 
     public string Name => "util-twilio-outbound_phone_call";
     public string Indication => "Dialing the phone number";
+    public const string WelcomeMessageAllowToBeInterrupted = "welcome_msg_allow_interrupt";
 
     public OutboundPhoneCallFn(
         IServiceProvider services,
@@ -106,6 +107,11 @@ public async Task<bool> Execute(RoleDialogModel message)
             processUrl += $"&init-audio-file={initAudioFile}";
         }
 
+        if (agent.Labels.Contains(WelcomeMessageAllowToBeInterrupted))
+        {
+            processUrl += $"${WelcomeMessageAllowToBeInterrupted}=true";
+        }
+
         // Make outbound call
         var call = await CallResource.CreateAsync(
             url: new Uri(processUrl),