### Answer
It sounds like you're experiencing unexpected behavior with your voice AI assistant ending calls prematurely. This could involve several issues such as misconfiguration, unexpected inputs that the assistant isn't handling properly, or issues with the assistant's logic.
Here are a few steps and checks you can consider:
1. **Review the Assistant Configuration**: Ensure that the assistant's logic is set up correctly according to the steps you want it to follow. This includes checking any conditions or triggers that might cause the call to end prematurely.
2. **Check for Errors in the Logs**: Utilize Vapi's logging capabilities to look for any errors or unusual activity around the time the call ends. If the assistant is configured to log detailed activity, this could provide insights into what's causing the early termination.
3. **End Call Conditions**: Double-check whether there are any conditions or specific phrases within your assistant's setup that might inadvertently trigger the end of a call. This includes reviewing any related functions or integrations that might influence call behavior.
4. **Contact Support**: If the issue persists and you're unable to determine the cause from your configurations and logs, reaching out to Vapi's support team could provide further insights. They can offer more detailed assistance, especially with access to backend data that might not be available to you directly.
Unfortunately, without more specific details on the assistant's configuration and the circumstances under which the calls are ending, it's challenging to provide a precise solution. Reviewing the detailed assistant setup and logs will likely be necessary to identify the root cause.