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====================asterisk dial plan===============
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[custom-chag]
exten => s,1,Noop(Checking to see if today is a chag)
exten => s,n,Set(chag=not_set)
exten => s,n,Macro(user-callerid)
exten => s,n,AGI(jh.php)
exten => s,n,Noop(chag is set to ${chag})
exten => s,n,Gotoif($["${chag}"="chag"]?chag:nochag)

exten => s,n(chag),1,Noop(Today is a Chag)
exten => s,n(chag),n,Playback(xmas-lights)
exten => s,n(chag),n,Hangup

exten => s,n(nochag),Noop(Today is NOT a chag)
exten => s,n(nochag),Playback(our-business-hours-are)
exten => s,n(nochag),Hangup