Historical clue formulations

• "I'm set, but thanks anyway" — 2023-05-22
• "You don't really have to" — 2022-12-21
• "That really isn't necessary" — 2021-11-19
• Polite refusal — 2021-07-01
• "Don't bother" — 2008-09-09
• "Thanks, but I'm O.K." — 2008-07-14
• "Seriously, don't bother" — 2005-09-12
• "Don't bother" — 2003-01-11
• "Really, you don't have to" — 2002-06-24