You can select the specific sitters who should receive the request. If those sitters decline, or if you’re getting impatient, just go into the booking and select “Send to More Sitters” to send it to additional sitters.
It’s not currently possible to send a booking request to 1-2 sitters on a priority basis, then have the request automatically go to the rest of the group if the priority sitters reply “no” or don’t respond by a certain date/time. This functionality is on the plan! Thanks for your patience!