Salesperson: Hello.
Customer: Hello.
Salesperson: Can I help you? What are you looking for?
Customer: I'd like to buy notebook.
Salesperson: What type or color is the notebook? What about red notebook?
Customer: I have blue one.
Salesperson: Okay, I have what you want.
Customer: How much is this notebook?
Salesperson: $20.
Customer: Okay, I take this notebook. Here you are.
Salesperson: Thank you for your purchase.