The conversation between human and AI assistant.
How do we politely tell someone we're talking to that he/she has bad breath?
What if they get offended or upset?
It's possible they might feel embarrassed or defensive, but try to approach the situation kindly and with empathy. It's not easy to hear criticism, especially about personal hygiene. You could also try bringing it up in a discreet manner, such as pulling them aside and mentioning it privately.