听力原文:M: Sophia, I' ve just confirmed our flight online, and it looks like we'll be delayed by an hour. The flight is now scheduled to leave at 4:00 due to the heavy wind. W: Then we' re in trouble. We won't be able to get to Chicago by 6:00 for the dinner with Mr. O'Neil. M: I' II talk to him. I was going to call him anyway to speak about our contract. W: Don't forget to apologize to him about being late. What time was the plane originally planned to depart?