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 do you shoot pool ?
Person2:You have 16 balls on the table , 7 solid colored , 7 striped colored , a black 8 ball , and the white ball .
Person1: And ?
Person2:You hit the white ball with your cue . The white ball hits the colored balls . And you want to get the colored balls into the pockets .
Person1: How do you know whether you should hit the solid or the striped one ?
Person2:At the beginning , it does not matter , but once someone gets one ball in , it is set .
Person1: Can I get the black ball in ?
Person2:The black ball has to be the final ball in the pockets .
Person1: Let's go and try now !
Output:
informal