Change of the price information in the confirmation e-mail, how?

Clients pay a session price for a photo shoot with me. In addition, there are further costs per selected photo.

The client has to pay a deposit when booking an appointment. In the confirmation email they will see the session price and the price of the deposit they have paid. But I don't want to give the impression that the session price is the price for everything, including the photos.

Where can I make the adjustments so that the confirmation emails say that this is only a session price, excluding photos?