Sentence 1: Mark had a 9am flight to Chicago. 
 Sentence 3: He had to wait in a very long line and he was sure to miss his flight 
 Sentence 4:  Just then, they announced that the plane to Chicago was delayed 
 Sentence 5:  Mark got lucky and felt relief because he had time to make his flight! 
 Option 1: He woke up late and hit traffic, it was 8:50 when he got to the gate. 
 Option 2: He woke up with plenty of time and made his way to the express check-in.