Is there a way to get begin time and end time for the conversion result of stream audio?

I am using azure-speech to recognize audio stream, from speech_recognition_samples.cpp, from class RecognitionResult I only can get the Text and m_duration, but how can I get the begin time and end time of the result in the speech?
I use azure-speech in this way : write audio stream to AudioInputStream, and get result from SpeechRecognizer

void SpeechContinuousRecognitionWithPushStream()
{
    auto config = SpeechConfig::FromSubscription("YourSubscriptionKey", "YourServiceRegion");

    auto pushStream = AudioInputStream::CreatePushStream();

    auto audioInput = AudioConfig::FromStreamInput(pushStream);
    auto recognizer = SpeechRecognizer::FromConfig(config, audioInput);
    promise<void> recognitionEnd;

    recognizer->Recognizing.Connect([](const SpeechRecognitionEventArgs& e)
    {
        cout << "Recognizing:" << e.Result->Text << std::endl
               << "  Offset=" << e.Result->Offset() << std::endl
              << "  Duration=" << e.Result->Duration() << std::endl;
    });

    recognizer->Recognized.Connect([](const SpeechRecognitionEventArgs& e)
    {
        if (e.Result->Reason == ResultReason::RecognizedSpeech)
        {
            cout << "RECOGNIZED: Text=" << e.Result->Text << std::endl
                << "  Offset=" << e.Result->Offset() << std::endl
                << "  Duration=" << e.Result->Duration() << std::endl;
        }
        else if (e.Result->Reason == ResultReason::NoMatch)
        {
            cout << "NOMATCH: Speech could not be recognized." << std::endl;
        }
    });

    recognizer->Canceled.Connect([&recognitionEnd](const SpeechRecognitionCanceledEventArgs& e)
    {
        switch (e.Reason)
        {
        case CancellationReason::EndOfStream:
            cout << "CANCELED: Reach the end of the file." << std::endl;
            break;

        case CancellationReason::Error:
            cout << "CANCELED: ErrorCode=" << (int)e.ErrorCode << std::endl;
            cout << "CANCELED: ErrorDetails=" << e.ErrorDetails << std::endl;
            recognitionEnd.set_value();
            break;

        default:
            cout << "CANCELED: received unknown reason." << std::endl;
        }

    });

    recognizer->SessionStopped.Connect([&recognitionEnd](const SessionEventArgs& e)
    {
        cout << "Session stopped.";
        recognitionEnd.set_value(); // Notify to stop recognition.
    });

    WavFileReader reader("whatstheweatherlike.wav");

    vector<uint8_t> buffer(1000);

    recognizer->StartContinuousRecognitionAsync().wait();

    int readSamples = 0;
    while((readSamples = reader.Read(buffer.data(), (uint32_t)buffer.size())) != 0)
    {
        // Push a buffer into the stream
        pushStream->Write(buffer.data(), readSamples);
    }

    // Close the push stream.
    pushStream->Close();

    // Waits for recognition end.
    recognitionEnd.get_future().get();

    // Stops recognition.
    recognizer->StopContinuousRecognitionAsync().get();
}