1 Holidays Black Diamond help need help ...I want to cancel a booking don't understand why the prices we're not updated for next year.. 10 M Adamopoulou Hello! Since this is only a Partner Community contact booking.com directly through your Extranet inbox tab or call your local BDC office. Wish you well. 11 BrookAve hi Holidays Black Diamond all you can do is : message the guest first in the reservation details page then click Request To cancel, option 2. Try to offer alternative dates .etc. Guest receives email to confirm. This is the best method and outcome, otherwise BdC will charge you relocation invoice Kind Regards.