Malfoid says no. Malfoid says no for a full minute, and then asks what time it starts, which is not the same as no.

MalfoidI am not carrying a lantern up a stair to be looked at by a wall.

MioneYou will not be looked at by a wall. You will be looked at by me, and I have been looking at you since I was thirteen.

The corridor is extremely quiet. Malfoid takes the candle and does not take the pin off, and that is a yes.