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:       Here's some dancing . See those guys stomping , clapping and shouting ? They're practicing step-dancing .  
 Person2:It sounds cool . The rhythms look really difficult .  
 Person1:        They basically turn their bodies into drums . There's a national step competition every year .  
 Person2:Well , black people are supposed to be great dancers .  
 Person1:        Wen ! That's only a stereotype . Like all Asians are supposed to be math geniuses . I'm not a great dancer , and you said you failed calculus .  
 Person2:Ha-ha ! You got me there ! 

informal