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:       Hello , Kate . 
 Person2:Hi , Peter . I didn't see you last night . Where did you go ? 
 Person1:        I was almost on line the whole night . 
 Person2:Did you play network games the whole night ? 
 Person1:        No , I listened to the music , too . 
 Person2:What are you going to do now ? 
 Person1:        I'm tired . I need a rest . 

formal