[Observability Docs] add user-specific prompts docs

solutions/observability/observability-ai-assistant.md

@@ -202,6 +202,20 @@ After creating the pipeline, complete the following steps:
 
     Ask something to the AI Assistant related with the indexed data.
 
+### Add user-specific system prompts
+
+User-specific prompts customize how the AI assistant responds by appending personalized instructions to all of your system prompts. For example, you could specify "Always respond in French," and all subsequent responses will be in French.
+
+A user-specific prompt only applies to the user that sets it.
+
+% Do we have any other suggestions on how this could be useful for users?
+
+To edit the **User-specific System Prompt**:
+
+1. To open AI Assistant settings, find `AI Assistants` in the [global search field](/explore-analyze/find-and-organize/find-apps-and-objects.md).
+2. Under **{{obs-ai-assistant}}**, click **Manage settings**.
+3. Switch to the **Knowledge base** tab.
+4. Select **Edit User-specific Prompt**.
 
 ## Interact with the AI Assistant [obs-ai-interact]