For online reservations, if the restaurant is available for immediate booking, the reservation will be confirmed within the same day.
On the other hand, if AutoReserve is handling the reservation by phone, the result will depend on the restaurant's response, and it may take anywhere from the same day to up to 10 days.
For reservation requests made several months in advance, the start date for accepting reservations may vary by restaurant, so the confirmation may come a few weeks before the visit.
Please note that the timing of the reservation confirmation depends on the restaurant's policies.