The client generally expects to receive a diagnosis, but also to be given information that will help him or her address current and past issues in order to move forward in life. There could be a very specific problem the client is having, or it might be an overarching feeling or problem, like depression or anxiety. Therapists expect clients to focus on the treatment options and advice they are given, and to take the relationship seriously. If clients are not willing to put in the work it takes to get better, it is very difficult for a therapist to actually help them.
