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:       What kind of note are you taking there . That looks like doodle to me . 
 Person2:It's picture association of the concept that the professor taught today . 
 Person1:        Does that actually work for you ? 
 Person2:I don't really know for sure yet . I'll tell you after the test on Friday . 
 Person1:        I like to use shorthand note taking . 
 Person2:I was told once that the more time you spend writing , the less you are paying attention and so you miss stuff . 
 Person1:        Hmm . I never thought about it that way . 
 Person2:One time I tried just listening , no notes , no pictures . I think I really learned more that day . 

formal