Amsterdam offers a wide range of accommodation possibilities, for all budgets and tastes.
The Netherlands in general, and Amsterdam in particular, is a very popular tourism destination in Europe and the world over, well-known for its high-level service standards, and you will find that most places, regardless of rate, are impeccable and professionally staffed.
You can book your hotel for ICCS 2020 by following the link below (to RAI Hotel Services).
Most hotels will be available until 6 weeks before the conference.
(some hotels are offered via Expedia; these will only stay online until sold out)