Someone

[globals]
DEFAULT=100

[incoming]
exten => _X.,1,Goto(s,1)

exten => s,1,Wait,1
exten => s,2,Playtones(ring)
exten => s,3,Wait,1
exten => s,4,Answer()
exten => s,5,Wait,2
exten => s,6,Background(thank-you-for-calling)
exten => s,7,Background(if-u-know-ext-dial)
exten => s,8,Background(otherwise)
exten => s,9,Background(pls-stay-on-line)
exten => s,10,Set(LOOPCOUNT=0)

exten => i,1,Playback(pbx-invalid)
exten => i,2,Set(LOOPCOUNT=$[${LOOPCOUNT} + 1])
exten => i,3,GotoIf($[${LOOPCOUNT} > 2]?t,1)
;exten => i,4,Goto(_X.,12)

exten => t,1,Macro(stdexten,${DEFAULT},${DEFAULT})
exten => t,2,Hangup()