Answer: rsvped

AnswerCrossword Clue
RSVPEDSaid "I'll be there"
RSVPEDUsed a bride's SASE, say
RSVPEDOffered regrets, perhaps
RSVPEDAnswered an invitation
RSVPEDDid an epistolary courtesy
RSVPEDAnswered, quickly
RSVPEDSaid "I'll be there with bells on," say
RSVPEDLet someone know if you can go
RSVPEDGot back (to)