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:       So Beth , what kind of music do you listen to ?  
 Person2:I listen to a lot of hip hop . What about you ?  
 Person1:        I mostly listen to pop music , but I like a lot of different stuff .  
 Person2:Yes , me too . I mostly listen to hip hop , but there are many genres of music I like . 

formal