Mine

[new-record]
exten => *41,1,BackGround(record/prompt_instruct)
exten => *41,n,Set(FILENAME=${TIMESTAMP:-6:6})
exten => *41,n,Record(/tmp/asterisk-recordings/${FILENAME}:gsm)
exten => *41,n,Background(record/prompt_save)
exten => *41,n,Background(record/prompt_review)
exten => *41,n,Background(record/prompt_delete)

exten => 1,1,Playback(record/prompt_saved)
exten => 1,n,Playback(record/prompt_id)
exten => 1,n,SayDigits(${FILENAME})
exten => 1,n,Wait(3)
exten => 1,n,Playback(record/prompt_id)
exten => 1,n,SayDigits(${FILENAME})
exten => 1,n,Wait(3)
exten => 1,n,Playback(record/prompt_id)
exten => 1,n,SayDigits(${FILENAME})
exten => 1,n,Hangup

exten => 2,1,Playback(/tmp/asterisk-recordings/${FILENAME})
exten => 2,n,GoTo(*41,4)

exten => 3,1,System(rm /tmp/asterisk-recordings/${FILENAME}.gsm)
exten => 3,n,Playback(record/prompt_deleted)
exten => 3,n,GoTo(*41,1)

exten => *,1,GoTo(*41,2)