automatic cancellation of pending sales orders

Hi,

I got a requirement of cancelling any pending sales orders in case of delivery not effected by a specific date. ie. if a sales order is booked for say 100 numbers with a delivery shedule for today but sales order is valid till the end of the .. incase the delivery is made for 50 numbers only within the month end, the balance should be automatically cancelled.

Have someone tried this, can any setting can be made to achieve this??

Regards,

Ajit