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:       Did you get your grades yet ?  
 Person2:Yeah . My whole GPA is screwed up now .  
 Person1:        Why ? What happened ?  
 Person2:Well , I bombed my econ final and ended up with a 1.7 .  
 Person1:        Ouch . You must be very disappointed .  
 Person2:Well , it's my fault because I didn't study as much as I should have .  
 Person1:        Why don't you re-take the class next year ?  
 Person2:That's what I plan on doing unless I keep screwing up . How did you do this semester ?  
 Person1:        I didn't do that well either . I ended up with a 3.2 this semester . That drops my total GPA to 3.45 .  
 Person2:My GPA is pretty similar to yours . I have a 3.1 now because of the stupid econ class .  
 Person1:        What was your GPA before this semester ?  
 Person2:I was sitting happy with a 3.4 .  
 Person1:        Why did it go down so much ?  
 Person2:Let's just say I screwed up more than my econ class .  
 Person1:        What happened to you ?  
 Person2:I started playing starcraft and ended up wasting a lot of time .  
 Person1:        You better stop slacking off .  
 Person2:You're right . I'm not going to play games during school anymore . 

informal