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:       We used to be very friendly , but it seems now that my daughter ’ s marriage has taken its toll of our relationship .  
 Person2:What do you mean ?  
 Person1:        I don ’ t like her husband , that bad egg , but my daughter insists on marrying him .  
 Person2:She is a grow-up . She can make her own decision .  
 Person1:        I wish she wouldn ’ t regret for her decision . 

informal