Part 1.
Salesman: Good morning, madam. Can I help you?
Woman: Yes, please. What is this device?
Salesman: Well, that is the most helpful invention in the world: The RoboVacuum - a vacuum cleaner!
Woman: Thanks, but we already have a vacuum cleaner at home.
Salesman: Well, it's not just any vacuum cleaner you've seen before. It's a smart robot and can do many things. Why don't you try this? First, place the vacuum cleaner on the floor.
Woman: Like this?
Salesman: Yes. Second, press the Clean button on the left if you want RoboVacuum to clean the whole room. Or you can press the Extra clean button on the right if you want to remove dirty stains.
Woman: What about this button under the name RoboVacuum?
Salesman: It's the Start button. Press it to start or stop the device. Try it! (Device-running sounds)
Woman: Wow. Amazing!
Part 2.
Salesman: Using RoboVacuum is a wonderful way to clean your house, but avoid using it on wet floors or it won't run.
Woman: I see.
Salesman: Don't use it for more than an hour either, or it will overheat and break down.
Woman: OK.
Salesman: Finally, you'll need to charge your RoboVacuum for five hours before you can use it.
Woman: Five hours?
Salesman: Yes, and RoboVacuum will become your best helper in your house!