*/
    public void generateNoResultsResponse(final String userMessage, final List<LlmMessage> history, final LlmStreamCallback callback) {
        if (logger.isDebugEnabled()) {
            logger.debug("[LLM] Delegating generateNoResultsResponse. llmType={}", getLlmType());
        }
        getAvailableClient().generateNoResultsResponse(userMessage, history, callback);
    }

    /**

     *
     * @param userMessage the user's message
     * @param history the conversation history
     * @param callback the streaming callback
     */
    void generateNoResultsResponse(String userMessage, List<LlmMessage> history, LlmStreamCallback callback);

    /**
     * Generates a response when the specified document URL is not found.
     *
     * @param userMessage the user's message

        applyPromptTypeParams(request, "unclear");
        request.setStream(true);

        streamChatWithConcurrencyControl(request, callback);
    }

    @Override
    public void generateNoResultsResponse(final String userMessage, final List<LlmMessage> history, final LlmStreamCallback callback) {
        final LlmChatRequest request = new LlmChatRequest();

                    phaseStartTime = System.currentTimeMillis();
                    callback.onPhaseStart(ChatPhaseCallback.PHASE_ANSWER, "Generating response...");
                    llmClientManager.generateNoResultsResponse(userMessage, history, (chunk, done) -> {
                        fullResponse.append(chunk);
                        callback.onChunk(chunk, done);
                    });