Couldn't book the time I wanted for 1 person, had to book it for 3. I heard Disney Dining will decrease the people on an ADR package if you call, decided to try chat first. Took about 20 mins but Chat re-booked me on a new res for 1 at the time I wanted, I really appreciated they actually dug into it a bit and got it done for me. Last time I tried something like that chat was like "nope, can't be done, bye!"