An assistants primary purpose is to help the person who is in charge of the company: running a company, or managing/managing people.The main tasks are: 1. Planning (planning meetings with managers/directors, keeping track of projects and deadlines, etc.). 2. Receiving calls from the customers and communicating with them about their problems (this can be done by speaking to clients face-to-face or through telephone). 3. Keeping up to date on all incoming information from the customers and other people involved in the project. 4. Helping with special cases and problems when they arise (by identifying solutions, filling out legal documents, etc.).