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:       You seem to like her very much , don't you ?  
 Person2:I can't deny that . She is so beautiful that I fell in love with her at the first sight . I wish I knew more about her .  
 Person1:        But I heard that she had a three-year-old girl .  
 Person2:I cannot belive that . It must be cooked up by someone . 

informal