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:       Hi , Maggy , Did you hear about David ?  
 Person2:About David , No , I didn ’ t hear anything .  
 Person1:        You know , about David and new boss .  
 Person2:Sorry , I don ’ t quite follow you .  
 Person1:        Well , I hear David have been fired .  
 Person2:Oh , that is a shame . He is really hard working . 

informal