The document provides a sample dialogue for shopping and some key points about using "can" to make offers and requests. In the dialogue, a customer asks a shop assistant for help finding a French-English dictionary. The assistant finds the dictionary and offers other options at different price points before the customer decides on the more expensive one. The notice section then explains that "can" is used as an auxiliary verb to make offers, like offering help or the item, and to make requests, like requesting the item or assistance.