@Tamas37 While I agree that you and the prospective host can communicate and possibly reach an understanding as to what additional services or amentities you require and they could provide, the purpose of the advertisement on AirBnB is to clearly define what the accommodation is, what amenities will be provided as a part of the expense and what services are available. Guests who try to bargain for more or are wanting to reduce the price because the advertised accommodation does not have everything that they require are usually encouraged to look elsewhere as they are not a good fit for the rental and have the potential to be disappointed or leave a poor review. Hosts wish to avoid this situation, which is why we provide only what is listed, perhaps with a few minor perks like breakfast makings or restaurant coupons.
I would suggest that you continue your search for an accommodation that meets your needs rather than negotiating with a host to add services and amenties.