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: Have you heard that new song by the Beastie Boys ?
Person2:Why do you listen to rap ?
Person1: It's not much different from that heavy metal music you like so much .
Person2:Heavy metal music is a lot different from rap music.You can dance to heavy metal .
Person1: Hey , you can dance to rap music !
Person2:I can't dance to it . And I know you can't either . Because I've seen you try .
Output:
informal