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:       Anita , I ’ Ve been here only three days and you ’ re leaving already .  
 Person2:Just for a few weeks . I need this vacation . You ’ ll be all right . You know the project we ’ re working on , and you ’ re a good scientist . Don ’ t worry . I ’ ll be back as soon as I spend or gamble all my money .  
 Person1:        Gambling ? Where ?  
 Person2:Las Vegas . I find gambling relaxing . I don ’ t take it seriously , the way some people do . Besides , I love the shows and the all-night atmosphere of the town . The casinos never close , you know .  
 Person1:        If you gamble all night , you ’ ll run out of money in a few days . 

informal