There are plenty of options for your accommodation in Parma; hotels, bed&breakfasts, room rentals and youth hostels will all warmly welcome you.
See the tourist information website:
http://turismo.comune.parma.it/en/thematic-channels/hotels-and-restaurants/where-to-stay/#null
Suggested hotels close to the conference venue are:
5 stars:
- PARK HOTEL PACCHIOSI – http://parkhotelpacchiosi.it/en/
- GRAND HOTEL DE LA VILLE – http://www.grandhoteldelaville.com/en/index.jsp
4 stars:
- HOTEL VERDI – https://www.hotelverdi.it/en-gb
- DU PARK – https://www.starhotels.com/en/our-hotels/du-parc-parma/
3 stars:
- HOTEL DANIEL – http://www.hoteldaniel.biz/