input question: M: Not in the usual shop. I bought it on the Internet. It's much cheaper than the ones we bought from the shops. What was said before this conversation????
output answer: W: Your MP3 is so beautiful. From which shop did you buy it?

input question: M: Here is the weather forecast: Fog is spreading from the east and it'll affect all areas by midnight. It will be heavy in some places. What was said before this conversation????
output answer: W: It's nearly ten o'clock. Let's listen to the weather forecast.

input question: W: After two sleepless nights, I'm finally through with it. What was said before this conversation????
output answer: M: How are you getting on with your essay, Mary? I'm having areal hard time with mine.

input question: W: Let's see. We have overnight business service. That takes just two days. What was said before this conversation????
output answer:
M: Excuse me! I just need to send this letter the fastest way possible.