Related Clues:

• Answer the host, for short
• Say you'll attend, say
• Request in an invitation
• Request made in French initials
• Say yes or no, say
• Click 'Going' on a Facebook event, e.g
• Write back as requested
• "Let us know if you're coming" on an invitation
• Send regrets, say
• 'Let me know' letters
• Say 'Yeah, I can make it,' say
• "I'll be there" message, e.g
• 'I'll be there' message, e.g
• Party host's request
• SASE insert, perhaps