Albus chuckled a bit and gestured towards one of the seats. "I have no doubt I have been dead for a long time in your time. I am Albus Dumbledore and I come from the year 1900. Just barely starting my time at Hogwarts. I promise you, 'I'm not pulling your leg'. Yes, that is what your era would probably say."
Albus's eyes twinkled again. "There are others here. From different time periods all emerged into one living together in a single village. You have your journal right?" Looking around before holding out his hand as the journal from inside the storage room came flying out. "Here. You might want to keep this close by as it is a way of communicating with others here in the village."
"And I am serving ice cream because it was the job I was assigned. I see this as a way of starting anew."