You're buying a new computer at an electronics store. You've told the salesperson which computer you want to buy, and then he asks:
That comes with a 90-day warranty. Would you like to purchase an extended two-year warranty?
You're a waiter at a restaurant. A customer is complaining about her meal, but she's already eaten it so you can't take it back. You want her to be satisfied, so you offer a free dessert:
May I offer you a complimentary dessert?
You have had a bad experience when you called your cable TV provider to get help with a problem. You're on an Internet forum where people are discussing their experiences with cable companies. You write:
Time Warner Cable's customer service leaves much to be desired.
companies, customer, formal, service, set phrase, understatement 
You're a makeup artist. You're choosing a lipstick to put on a customer. You think this a good color of lipstick for her, so you say:
This color really goes well with your skin tone.
Someone asks you for change for a $20 bill. You want to know if they need 20 one-dollar bills, two ten-dollar bills, four five-dollar bills, or some other combination. You ask:
Do you want that all in ones?
You went to a grocery store where the cashiers are often rude to you. You can't believe that they're so rude. You're complaining to a friend about the store employees. You say:
They don't even make eye contact with you!
Use "They don't ___" for things that people often don't do, or things that they never do. The word "even" shows that you think something is basic. In the example the speaker thinks that making eye contact is a basic level of politeness that all store employees should follow. She can't believe that the employees act this way.
"Making eye contact" with someone means looking at their eyes while they look back at you. When two people look at each other's eyes for a long time, you say that they're "staring at" each other. But when they look at each other for just a moment, it's called "making eye contact". In the United States, it's polite for people to smile and make eye contact with people who they deal with. You should make eye contact with a customer, someone you've just met, someone you see on the street who you recognize from your work, and so on.
The word "you" is used in English to talk about people in general. In the example above, the word "you" doesn't just mean the person who the speaker is talking to. It means all the customers at that store. Here's another example:
cashier, customer, politeness (topic), rude You work at a clothing store. You see a customer who's looking at pants but seems to want something specific. You want to offer to help him. You ask:
Is there a certain size you're looking for?
You're talking about a recent announcement that Starbucks is going to offer free Internet access to all customers. You think it's a good idea for them, and now you're talking to your husband and explaining why:
That's going to attract a lot of new customers.
You rented a car and returned it at the last minute. The car rental company charges $100 for returning cars late. You're telling a friend from work about this. You say.
I would've had to pay a hundred-dollar fine if it had been late.
customer, money, past, storytelling You're a professional photographer. You're talking to someone who's not a photographer about your industry. You are discussing how difficult photography is because of c:
There's fierce competition among photographers for clients.
adjective, between/among, client, competition, customer 