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:       Finding an excuse is obviously down your alley . And trying to avoid taking care of the children is what you are good at . 
 Person2:Listen , Nancy . If I don't work hard , I will be laid off . 
 Person1:        You are passing the buck . I'll be hanged if I ask you to go to the park with us . 
 Person2:Come on , Nancy . Play it cool . I go with you and burn the middle night oil tonight . 

informal