Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.
Input:  Person1:       Okay , let's begin . Hello , everyone . My name's Karl Roberts , and I'll be your teacher for this class , Intercultural Communication .  
 Person2:( quietly ) I don't understand what the teacher is saying .  
 Person1:        Uh , to begin with , please take a look at the syllabus in front of you . As you all should know by now , this class meets on Tuesdays and Thursdays from 3:15 to 4:50 .  
 Person2:That's terrible . He speaks too fast . How can I catch his meaning ?  
 Person1:        Again , as you see on your course outline , grading is determined by your performance on a midterm and a final test , periodic quizzes , and classroom participation .  
 Person2:I'm not sure whether I can pass the course or not . 

formal