The arrival window, forty to sixty minutes after confirmation, is how long a therapist takes to reach any central Amsterdam hotel or address; Schiphol is arranged separately.
Room service quotes a time; so does the house. From the moment a same-day reservation is confirmed, a therapist reaches any central Amsterdam door within forty to sixty minutes. That figure does not shift from one neighbourhood to the next. A tower beside the station, a townhouse hotel on a canal and a serviced flat in the south of the city all share it, and the office does not publish a different promise for each district.
It starts at confirmation, not at the first message. The office typically answers the WhatsApp thread in about ten minutes. Where the reservation carries a deposit, she sets out once it has settled. A guest who writes at a quarter past ten should therefore picture a knock somewhere around eleven, not half past ten.
A reservation made ahead for a named hour works differently. She is timed to knock at the hour agreed, and the confirmation states it.
Forty minutes is a useful length of time in a hotel room. It is enough to shower, dim the overhead lights in favour of a lamp, nudge the heating a little warmer and put the room number into the thread. A journal piece, The twenty minutes before the knock, walks through that interval.
A hotel that locks its lifts at night needs the guest to meet her at the lifts and travel up together, which is a matter of timing rather than extra waiting; see keycard lift. A canal house with three flights and no lift adds a minute or two on the stairs.
Schiphol and the airport hotels sit outside the standard window. They are arranged individually, they always carry a deposit, and a little notice helps. Nothing beyond Amsterdam is reached at all. For late requests in general, the tonight guide covers what to expect after dark.
Tonight
Name the room, the hour and how long you would like her there. The reply comes back in about ten minutes with who is free.