What does the woman say about the meeting?

M: This is 7236627. Please leave a message.
W: Good morning, Dr. David Green. This is Elisabeth Smith, the secretary for the meeting. I’m ringing you because we have to make some last-minute changes to the meeting,and there isn’t time to write to you before the meeting starts. For reasons that I won’ t explain now, we have to make our meeting a half day shorter than planned. Your talk is now on Saturday, at 11: 30 a.m.,and not at 2: 30 p.m., as you were advised before. We still expect your talk to last an hour. We hope that this does not cause you too many problems. And we apologize for the change. The place of the talk is still the Science Building. But it is in Lecture Hall B. I’m afraid the room in which you will be staying has also been changed. It’ s now Room 208 in the Parkinson Building. You can pick up the room key from the information desk when you arrive. Thank you,and look forward to seeing you at the meeting.