Index: ccss.c
===================================================================
--- ccss.c	(revision 307274)
+++ ccss.c	(working copy)
@@ -3905,7 +3905,9 @@
 	match_flags = MATCH_NO_REQUEST;
 	if (!(core_instance = ao2_t_callback_data(cc_core_instances, 0, match_agent, device_name, &match_flags, "Find core instance for CallCompletionRequest"))) {
 		ast_log_dynamic_level(cc_logger_level, "Couldn't find a core instance for caller %s\n", device_name);
-		return -1;
+		pbx_builtin_setvar_helper(chan, "CC_REQUEST_RESULT", "FAIL");
+		pbx_builtin_setvar_helper(chan, "CC_REQUEST_REASON", "NO_CORE_INSTANCE");
+		return 0;
 	}
 
 	ast_log_dynamic_level(cc_logger_level, "Core %d: Found core_instance for caller %s\n",
@@ -3915,6 +3917,7 @@
 		ast_log_dynamic_level(cc_logger_level, "Core %d: CallCompletionRequest is only for generic agent types.\n",
 				core_instance->core_id);
 		pbx_builtin_setvar_helper(chan, "CC_REQUEST_RESULT", "FAIL");
+		pbx_builtin_setvar_helper(chan, "CC_REQUEST_REASON", "AGENT_NOT_GENERIC");
 		cc_unref(core_instance, "Unref core_instance since CallCompletionRequest was called with native agent");
 		return 0;
 	}
@@ -3924,14 +3927,19 @@
 				core_instance->core_id);
 		ast_cc_failed(core_instance->core_id, "Too many CC requests\n");
 		pbx_builtin_setvar_helper(chan, "CC_REQUEST_RESULT", "FAIL");
+		pbx_builtin_setvar_helper(chan, "CC_REQUEST_REASON", "TO_MANY_REQUESTS");
 		cc_unref(core_instance, "Unref core_instance since too many CC requests");
 		return 0;
 	}
 
 	res = ast_cc_agent_accept_request(core_instance->core_id, "CallCompletionRequest called by caller %s for core_id %d", device_name, core_instance->core_id);
 	pbx_builtin_setvar_helper(chan, "CC_REQUEST_RESULT", res ? "FAIL" : "SUCCESS");
+	if (res) {
+		pbx_builtin_setvar_helper(chan, "CC_REQUEST_REASON", "REQUEST_NOT_ACCEPTED");
+	}
+
 	cc_unref(core_instance, "Done with CallCompletionRequest");
-	return res;
+	return 0;
 }
 
 static const char *cccancel_app = "CallCompletionCancel";
@@ -3948,18 +3956,26 @@
 	match_flags = MATCH_REQUEST;
 	if (!(core_instance = ao2_t_callback_data(cc_core_instances, 0, match_agent, device_name, &match_flags, "Find core instance for CallCompletionCancel"))) {
 		ast_log(LOG_WARNING, "Cannot find CC transaction to cancel for caller %s\n", device_name);
-		return -1;
+		pbx_builtin_setvar_helper(chan, "CC_CANCEL_RESULT", "FAIL");
+		pbx_builtin_setvar_helper(chan, "CC_CANCEL_REASON", "NOTHING_TO_CANCEL");
+		return 0;
 	}
 
 	if (strcmp(core_instance->agent->callbacks->type, "generic")) {
 		ast_log(LOG_WARNING, "CallCompletionCancel may only be used for calles with a generic agent\n");
 		cc_unref(core_instance, "Unref core instance found during CallCompletionCancel");
-		return -1;
+		pbx_builtin_setvar_helper(chan, "CC_CANCEL_RESULT", "FAIL");
+		pbx_builtin_setvar_helper(chan, "CC_CANCEL_REASON", "NOT_GENERIC");
+		return 0;
 	}
 	res = ast_cc_failed(core_instance->core_id, "Call completion request Cancelled for core ID %d by caller %s",
 			core_instance->core_id, device_name);
 	cc_unref(core_instance, "Unref core instance found during CallCompletionCancel");
-	return res;
+	pbx_builtin_setvar_helper(chan, "CC_CANCEL_RESULT", res ? "FAIL" : "SUCCESS");
+	if (res) {
+		pbx_builtin_setvar_helper(chan, "CC_CANCEL_REASON", "CANCEL_FAILED");
+	}
+	return 0;
 }
 
 struct count_monitors_cb_data {