Need help with Conceptual Model for next assignment:

Richmond Alternative Family Therapy (RAFT) is a small family counseling practice located in Richmond, Virginia. It needs an information system to schedule appointments. There are currently five counselors working in the practice. Their facility has four rooms that can be used for scheduling counseling sessions. Each appointment is scheduled for a particular date and has a start time and a duration (in minutes). Each appointment is for exactly one counselor and exactly one client. Each counselor may have many appointments and each client can have many appointments. Each appointment is in a particular room and each room can have many appointments. However, no room can have more than one appointment being held at any particular time. Of course, when a new counselor, client, or room is added to the system, it will not have had any appointments, so it is possible for each to exist without being associated with a particular appointment.

Counselors and clients are both people, so they will need standard contact information: first name, last name, address, city, state, zip code, phone number, email address. Rooms have a room number and a room name.