Amelia: What time is the test tomorrow?
Olivia: It starts at 8.
Amelia: So early???
Olivia: It was supposed to be at 10, but the room will be taken for some events.
Amelia: Good that you told me
Amelia: I wanted to wake up at 5 and study 
Olivia: Have you studied already?
Amelia: A bit. 
Olivia: Me too.
Amelia: I guess I won't go to bed at all
Amelia: If the test is so early...
Olivia: I cannot. I have to sleep at least a few hours
Olivia: Otherwise I won't perform well.
The test starts at 8 tomorrow. Amelia will study until late at night, but Olivia needs to sleep at least a few hours to be able to perform well. 