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:       I'd be a basket case if you think of me that way . I need your understanding .  
 Person2:I know , I know . But you always bat around without doing things useful .  
 Person1:        Can ’ t you be more considerate ? I need your encouragement .  
 Person2:All right . Do what you can do now instead of twiddling your thumbs . 

informal