Harry Potter has just arrived at King's Cross station, he is a little lost, this is the first time he comes here.
He has to take the Hogwarts Express from the new three-quarter track. But he doesn't know what time he's leaving
He decided to ask for help from a controller.
"Excuse me sir, I have to take the Hogwarts Express on track nine three-quarters. But I don't know what time he has to go, can you tell me?"
"Of course the train leaves the station at eleven o'clock"
"And what time is it please ?"
"It's ten fourty"
"And at what time should it arrive at destination?"
"He must arrive at Hogwarts at four thirty"
"Thank you sir"