I am sorry to hear you do not have any available time. Even if you could spare a few minutes, it would be greatly appreciated. If not I shall, of course, relay to Professor Dumbledore that you are busy. I am sure he will be absolutely disappointed to hear such tidings. I hope this blatant refusal scheduling conflict does not spread any ill publicity for your book debut. As it seems odd one would not want to meet with the one focused on in a publication. Like you are afraid of facing the man himself. Cowards sling mud at their enemies back instead of in their face. Best wishes.