Related Clues:

• It might mention a plus-one
• ''Get back to us''
• Say 'Sorry, can't make it,' e.g
• "Tell me if you're coming to the party," briefly
• ___ card, part of a wedding invitation
• "Get back to us" letters
• 'Get back to us' letters
• Invite request
• Respond to the host
• "Please reply" abbr
• Confirmation letters?
• Indicate availability, in a way
• Tell 'em you'll be there
• "Tell me if you're coming" letters
• Say that you're going, say