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:       I don't understand why some parents keep beefing and complaining about their daughters not being able to follow suit .  
 Person2:Yeah . Li Na's mother has been building a fire under her since her neighbour's daughter got married with a Canadian . She's almost driving Li Na crazy .  
 Person1:        If I were Li Na , I would ask her if she had done that .  
 Person2:She a as meek as a lamb . She never goes against anyone or anything . She's as good as gold , you know ? 

informal