----------------------------- **While I generate an answer, here are some sources that might be helpful**: * [Call Ended Reason]() * [Create Phone Call]() * [Update Assistant]() * [List Calls]() -----------------------------

### Answer If your first message is not working and you're encountering an error, specifically when using ChatGPT 3.5 with Eleven Labs voice, it could be related to a common issue discussed in the Discord forum. Users have experienced similar errors like "pipeline-error-first-message-failed" when using Eleven Labs voices, especially on free plans. This can occur due to unusual activity detected on the account, leading to restrictions or limitations on the service [(1)]() [(2)]() . To address this, you might want to consider the following steps based on insights from the Discord discussions: - Verify if there's any unusual activity on your Eleven Labs account that might be causing restrictions. - Consider upgrading your Eleven Labs plan if you're currently on a free plan, as this could lift certain limitations and resolve the issue. - If latency is a concern with ChatGPT 3.5, using an alternative voice provider like Rime-AI was suggested to potentially cover up the latency introduced by the GPT-4 model [(1)]() . These steps are derived from user discussions and not from the official documentation, so it's also a good idea to check any account-specific limitations or restrictions directly with Eleven Labs or through their support channels.

Glad I could be helpful. Feel free to create a new thread with any new questions you may have.