You can delete your daily report via chat message.
Deleting via chat message
Daily report deletion is only permitted via chat, you should send a private message to DailyBot with the command daily reset and DailyBot will delete your Today's report.
Only Today's personal report can be deleted
You can only delete your own daily reports, and only the report for the same present day.
You cannot daily past reports or other user reports (even if you are an administrator).