Is there an app for instant order replies and delivery time estimates?

[Kenneth_K]

I am looking for an app that allows me to reply to order instantly,

like this, the customer makes an order, the customer is placed on hold, the order shows on my computer then I can accept or decline the order and select the estimated delivery time ( 30min | 45min | 60min), and then the customer gets a notice saying your order is declined/accepted and the delivery time

is there a app for that or some other solution