[Asterisk-Users] extensions.conf

[Altus Snyman]

Good day all
I have my extensions sorted out nice but I need some help with more advance 
config.In short myne looks like this

[company1]

exten => s,1......... plays the message,saying 1 for sales 2 for accounts ens
.
.
.

exten => 1,1,Dial(SIP/40615)     
exten => 1,2,Dial(SIP/403,15)                   
exten => 1,3,Voicemail2(u406)                 
exten => 1,4,Hangup    
..............ens
No what I want it to do is if you press 1 it will dial sip 406 for 15 and 403 
for 15s AND then give you a voice that says press 1 for voicemail,2 for mail 
menu and 3 to ring again?
Can someone please help ?
Thanks
Altus