assist with
To help with something. A noun or pronoun can be used between "assist" and "with." Who wants to assist me with this endeavor? My boss wants me to assist with this project, so here I am!
assist someone with someone or something
to help someone manage someone or something, especially with lifting or physical management. Assist me with Jane, won't you? Will you assist me with this heavy box? Sally assisted herself with the math problem. She did it on her own.