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:       Sorry , I overslept . My alarm clock didn't go off this morning .  
 Person2:Again ?  
 Person1:        That's right , even though I did set the alarm last night .  
 Person2:Your clock never works . Perhaps you should buy a new one .  
 Person1:        Well . If it breaks down again tomorrow , I'll definitely buy a new one .  
 Person2:Maybe by then it will be too late .  
 Person1:        What do you mean too late ?  
 Person2:By that time , you will be fired . 

informal