How does it work if I already have a reservation, but I'm on the hunt for a different time? I currently have a Tusker House breakfast reservation for a less than desirable (imo) time. If one were to come open for a time I do want will they let me make the reservation when I already have another reservation for the same restaurant that same day/meal? Will I have to cancel the one I have and then make that one, possibly risking losing them both?