@Jen6324 It's unfair to guests to continue taking reservations when you are selling your house. And it's unfair to them also to think you can just transfer their bookings to the new owner. Guests book based on reviews and ratings, which are attached to the host, not the listing. You have no way of knowing if the new host will be a good one and neither do the guests.
And yes, you are trying to sell the reservations if you just were allowed to transfer them to a new host.
Trying to wring every last penny out of a listing up until the day it sells seems quite greedy to me and disrespectful of guests.