The more you can tell your trainer about what you are looking for in terms of help, the more they can deliver. So, for example, if you need help with Excel and and want to focus on pivot tables, tell your trainer, "pivot tables," not just, "Excel" so you don't spend your session learning about basic functions because this wasn't made clear between the parties.
Your trainer should ask you what problem you are trying to solve so by being as specific as possible, you can ensure every minute of your training is time well spent.
It is also worth clarifying where training will take place in light of any equipment or software that may need to be provided. If your trainer has a library of resources they would like to refer to, it may make sense to visit them. Alternatively, if you have work in progress you want them to advise upon, request they come to you.
Diana (Miss)Law