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:       Oh , the food here really is bad . My soup was cold and meat , ur ... it was like leather .  
 Person2:Yes . And they don ’ t give you very much either . I ’ m still hungry .  
 Person1:        I ’ m sure this one is especially bad . And the word is so unpleasant .  
 Person2:Don ’ t do this ! Don ’ t do that ! You mustn ’ t do this ! You can ’ t do that !  
 Person1:        Well , I ’ m going to write a letter of complaint .  
 Person2:And we ’ ll all help you . 

informal