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: Why are you so late ?
Person2:I've been through a lot today . I forgot to set my alarm clock last night , so I woke up late this morning . And what is worse , I missed the school bus .
Person1: That's enough . Sit down .
informal

Person1: You ready ?
Person2:Am I ready for what ?
Person1: Are you ready to transfer to a new school tomorrow ?
Person2:Oh . Yes , I ' m ready to transfer .
Person1: You ' re not nervous , are you ?
Person2:I ' m very nervous .
Person1: Why are you nervous ?
Person2:I ' m not going to know anybody there .
Person1: That ' s not a problem .
Person2:That makes me nervous .
Person1: It ' s fun meeting new people .
Person2:I didn ' t think about it that way .
formal

Person1: Mary , why don't you come to my house this Saturday ?
Person2:I don't know . I'll have to ask my host mom .
Person1: Come on , Mary . This is America . You make your own decisions here .
Person2:But I still have to tell her .
Person1: Of course .
Person2:Tell you what , give me your phone number .
Person1: It's 555-4321 .
Person2:Got it . I'll call you later tonight and we can talk about what to do on Saturday .
informal