One of the most disconcerting this about magi chats is waiting for the agent to repsond. The user hits enter in the chat there is no indication that the agent is working. The emotional reactiion is to 'bang on the keys".

Maybe rolling dot, a tapping finger, some gif or animation that the agent is working. Or a sound... https://www.trekcore.com/audio/toscomputer/voice/tos_datareceived_ep.mp3