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:       How did you get into hip hop ?  
 Person2:Well , all my friends listen to it , so I became a big fan too .  
 Person1:        Who is your favorite hip hop artist ?  
 Person2:I'm a big fan of Snoop Dog . 

informal