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: Ms . : Do you have a question , Mary ?
Person2:No . That's not why I raised my hand . I need to go to the ladies ' room .
Person1: Ms . : Let me give you a hall pass for it .
Person2:What's a hall pass ?
Person1: Ms . : With a hall pass , you can go to the ladies ' room or wherever you need to go during class time .
Person2:I see .
Person1: Ms . : If a teacher stops you in the hallway , just show him or her the pass .
Person2:Or else I'll get into trouble .
Person1: Ms . : That's right .
formal

Person1: I went out with Leo last night . It was really exciting .
Person2:Really ? You are a lucky dog . You know , many girls dream of dating him .
Person1: Yes , I know . He's really on the A-list .
informal

Person1: Tom , you look thoughtful and unhappy recently . What's wrong with you ?
Person2:Lily broke up with me last week . In fact , she dumped me .
Person1: Why ? I mean , why did she part company with you after seven years together ?
Person2:She said it was because we had very different ideas about life .
Person1: Do you believe her excuse ?
Person2:Of course not . I knew she had fallen in love with another guy . It is difficult to see her move on so quickly .
Person1: Come on , buddy , cheer up . Why not do some sports with me ? Violent exercise might help to shake you out of your disappointment in love .
Person2:Thank you , Steven . You are really a good friend .
informal