You're starting a business. You need a bank account, so you walk into a bank and say this to an employee who's sitting at the customer service desk.
You have a swimming pool in your yard. The water looks dirty, so you say something to your husband about it.
Someone you work with has come over to your house to visit. You offered him something to drink, and he said that he'd like a coffee. You ask him this to find out if he likes sugar and milk in it.
A coworker is visiting you at your home for the first time. You want to be polite, so you offer him something to drink.