The community member is trying to attach a user feedback score to a Phoenix/OpenInference trace. They are looking for a way to find the trace corresponding to a response and update it. The community members have discussed that they cannot find anything in the llama-index code to achieve this. They have suggested that it might be possible to get the event type instance from a StreamingAgentChatResponse response, and then use that information to update the trace directly in Phoenix, although they acknowledge that this approach may be "hackish". The community members have also suggested that having a "evaluate response" CBEvent type that can be traced would be a nice feature to have.