Its answering from file its fine. But I have many Assistant and the every user will answer from selected file.
Like I have two assistant ( A1, A2 ) and three file ( F1, F2 F3) A1 will answer from F1 and A2 will answer from F1 and F2.

How to achieve that.

const askQuestion = async (fileId, question, retryCount = 0) => {
// Constructing the prompt for OpenAI API
const prompt = Answer the question based on the file content (ID: ${fileId}): ${question};

try {
    // Sending request to OpenAI API
    const response = await axios.post('https://api.openai.com/v1/chat/completions', {
        model: "gpt-4o",
        messages: [
            { role: "system", content: "You are a helpful assistant." },
            { role: "user", content: question }
        ],
        prompt: prompt, // Include the constructed prompt
        max_tokens: 100 // Optional: You can adjust this as needed
    }, {
        headers: {
            'Content-Type': 'application/json',
            'Authorization': `Bearer ${OPENAI_API_KEY}`
        }
    });

    return response.data.choices[0].text;
} catch (error) {
    console.log(error);
    if (error.response && error.response.status === 429 && retryCount < 3) {
        const backoffTime = exponentialBackoff(retryCount);
        // console.log(`Rate limit exceeded. Retrying after ${backoffTime}ms...`);
        await new Promise(resolve => setTimeout(resolve, backoffTime));
        return askQuestion(fileId, question, retryCount + 1); // Retry recursively
    } else {
        throw error; // Throw if retries are exhausted or for non-rate limit errors
    }
}

};

app.post(‘/ask’, async (req, res) => {
const { fileId, question } = req.body;

// Check if fileId and question are provided
if (!fileId || !question) {
    return res.status(400).send('fileId and question are required');
}

try {
    const answer = await askQuestion(fileId, question);
    res.json({ answer });
} catch (error) {
    console.error('Error asking question:', error);
    res.status(500).json({ error: 'Failed to get response from OpenAI API' });
}

});