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:       Lily ! Why aren't you up and ready for school ?  
 Person2:I don't feel so good , Mom .  
 Person1:        Lily , if you're acting sick just because you want to play hooky ...  
 Person2:No , Mom . I'm really sick .  
 Person1:        Oh , that's a nasty cough . Let me feel your head . You're on fire ! 

informal