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'.

Person1: All right . But these are black and I don ' t like black shoes . They ' re dull .
Person2:Well , black is a better color than pink . Pink ' s for girls .
Person1: Then why are you wearing black shoes ?
Person2:Because ... oh , all right . You win . Let ' s pay for them and go .
Person1: Hey , thanks , mum .
informal

Person1: What happened to my cup ?
Person2:I accidentally knocked it off the table and it broke . I'm really sorry .
Person1: Don't worry about it . I've got another one I can use .
formal

Person1: Have you gone bowling before ?
Person2:No . Could you tell me something more about it ? I want to play well .
Person1: There are 10 frames in a bowling game . Each player is allowed to bowl two balls in each frame .
Person2:You just said 10 rounds .
Person1: ' Round ' and ' frame ' are two different terms .
Person2:Perhaps you can tell me a little more about this .
Person1: Hey , slow down . I'll tell you more while playing .
formal