answer: #Person2# wants to buy some plants to keep the earth fresh in the cold season and #Person1# recommends #Person2# the palm and the peace lily. #Person2# decides to buy the peace lily.
documents: #Person1#: Hi, Miss. Freezing cold, isn't it? What can I do for you?
  #Person2#: I'd like some plants that can keep the earth fresh.
  #Person1#: Especially in this cold season when you can't keep die window open, isn't it?
  #Person2#: Absolutely. And something that's easy to care for and not expensive.
  #Person1#: OK, Miss. Our shop won't disappoint you. Look at these plants. They've just come in and I bet you like one of them. This is a corn plant. The tall tree can grow more than six feet and it doesn't need any water or light.
  #Person2#: Quite striking, isn't it? What's that?
  #Person1#: A palm. It adds a tropical touch to your room. The leaves are perfect for cleaning your air. It has a long life and it's easy to care for.
  #Person2#: Oh, this lovely small plant has beautiful white flower. What do you call it?
  #Person1#: Peace lily. Even the flower isn't blooming, its dense leaves look great.
  #Person2#: Perfect. It's just what I want.
  #Person1#: Won't you have a look at Janet Craig and Mother-in-Law's Tongue? And they're just as good. No, thanks. The peace lily is OK. The more I see, the less certain I become, you know.