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:       One family skeleton of my family was that my younger brother has an axe to grind .  
 Person2:What did he aim at ?  
 Person1:        He began to be interested in finance because he thought he would be able to inherit the family ’ s fortune .  
 Person2:How could he have such an ill intention ? I think your father can see that through . 

formal