Like ocgineer said, keep the replies in the same chat. Replying to public chat commands in a whisper is poor UX for both the user who used the command and others who read the chat. “They’re using commands, but not getting replies?” “I used it but didn’t get a reply?” People often don’t see they’ve been whispered until hours or even days later. At that point, they might have already forgot they requested the information and report the bot for unsolicited spam.
Please reply in the same place the command was issued in. Always.