### Answer The issue you're describing involves Retell's turn-taking model and how

content_complete

affects when

response_required

events are triggered in the LLM WebSocket connection [(1) ]() . Based on the LLM WebSocket documentation, Retell sends

update_only

events for transcript updates and turn-taking changes, and

response_required

events when it determines it's appropriate to ask for a response from your server . The turn-taking model combines VAD (Voice Activity Detection) and predictive cues to determine when to listen or speak . When

content_complete

doesn't return

true

after agent responses (beyond response_id 0) , Retell may not recognize that the agent has fully finished speaking, which can delay turn-taking resolution to

user_turn

. This could explain why short affirmations like "okay" or "yes" weren't triggering

response_required

immediately—the system might still be waiting for the agent's content to be marked complete before confidently switching turns . Potential troubleshooting steps: 1. Verify your response events - Ensure you're setting

content_complete

to

true

in your response events when the agent finishes speaking . The response event structure requires a

content_complete

field that signals when the response is fully delivered . 2. Check responsiveness settings - If using Retell LLM, review the

responsiveness

parameter (ranging from 0-1) , which controls how responsive the agent is—lower values mean the agent waits more before responding [(2) ]() [(3) ]() [(4) ]() . 3. Review interruption sensitivity - The

interruption_sensitivity

parameter (0-1) controls how easily users c

an interrupt the agent . Lower values require more words/time for interruption, which might contribute to delayed turn-taking . For the specific call (call_0c20a368b8740f5ca1cf048776b) , I recommend checking your server logs to confirm whether

content_complete: true

was sent in response events after response_id 0, and consider adjusting responsiveness/interruption sensitivity settings if using Retell LLM .

​ To learn more, see the sources I considered: [[1] LLM WebSocket](https://docs.retellai.com/api-references/llm-websocket) [[2] Get Retell LLM](https://docs.retellai.com/api-references/get-retell-llm) [[3] Create Retell LLM](https://docs.retellai.com/api-references/create-retell-llm) [[4] Update Retell LLM](https://docs.retellai.com/api-references/update-retell-llm) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.