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:       What does your mother do , may I ask ?  
 Person2:My mother works in a company as an accountant .  
 Person1:        Is she busy ?  
 Person2:Not always , she's rather busy at the end of the year . 

formal