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:       I enjoy watching Channel 5.They always have films from all over the world .  
 Person2:How about the languages .  
 Person1:        I can read the subtitles.My set is a huge-screen one .  
 Person2:That's more convenient . 

formal