How can I instruct my prompt assistant to end the call when a voicemail is detected?

Hi there! 👋 I'd be happy to help you set up your prompt assistant to end calls when voicemail is detected. I can definitely help you with configuring your prompt assistant to automatically end calls when voicemail is detected in Vapi. To instruct your prompt assistant to end the call when voicemail is detected, you'll need to: 1. Enable voicemail detection - According to the [Vapi documentation](https://docs.vapi.ai/phone-calling/voice-mail-detection), you have two methods for detecting voicemail: - Using Twilio's built-in detection - Using Vapi's built-in LLM-powered tool - For best results, enable both methods simultaneously 2. Configure voicemail detection settings - Here's an example configuration:

json
   "voicemailDetection": {
     "provider": "twilio",
     "voicemailDetectionTypes": [
       "machine_end_beep",
       "machine_end_silence",
       "human",
       "fax",
       "unknown",
       "machine_end_other"
     ],
     "enabled": true,
     "machineDetectionTimeout": 45,
     "machineDetectionSpeechThreshold": 2400,
     "machineDetectionSpeechEndThreshold": 2400,
     "machineDetectionSilenceTimeout": 6000
   }

3. Include the endCall tool in your assistant configuration - Add the

endCall

tool to your assistant's available tools:

json
   {
     "model": {
       "provider": "openai",
       "model": "gpt-3.5-turbo",
       "messages": [
         {
           "role": "system",
           "content": "You are an assistant. When voicemail is detected, use the endCall function."
         }
       ],
       "tools": [
         {
           "type": "endCall"
         }
       ]
     }
   }

4. Update your system prompt - Modify your assistant's system prompt to include instructions for handling voicemail detection. For example: ```

when a voicemail is detected using existing tools, it first tries to leave a voicemail message if it's not empty. Then, these tools will end the call by themselves.