The connect support chat idle prompt has a default message of 'Are you still there?'. This default message can be edited within the connect_support_idle_prompt UI Macro. Please note however, that the idle prompt modal template itself cannot be modified.
You can edit the message that is shown in the chat idle prompt by editing the connect_support_idle_prompt UI macro.
- Log into your instance as an admin
- Go to System UI > UI Macros
- Search and open the UI Macro "connect_support_idle_prompt"
- In the XML field, edit the gs.getMessage as you see fit: