Sentence 1: Cam called his friend Joe to find out where Joe was. 
 Sentence 3: Cam drove to the nearest diner and looked for Joe 
 Sentence 4:  Joe was nowhere to be seen 
 Sentence 5:  Cam called Joe and Joe said he was at a different diner 
 Option 1: Joe explained that he was at the diner and told Cam to wait for him at home, to which he agreed. 
 Option 2: Joe explained that he was at the diner and invited Cam.