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 did her boss say to you ?  
 Person2:He asked me to beef up in the work .  
 Person1:        Yeah . You look so unhappy recently . What ’ s the matter .  
 Person2:Nothing , thanks . I am just not in the mood these days . 

informal