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:       How time flies ! Why I always feel haven't enough time to work and study ?  
 Person2:Yes , I also felt that . I'm always busy , and have no time for rest . I don ’ t know how to make use of time .  
 Person1:        Maybe we should make a plan and list what we should do next , and follow it .  
 Person2:That's a good idea . And in this way we will know how we spend our time and spare a lot of time to do other things .  
 Person1:        You are right . Let ’ s stop idling around and do something .  
 Person2:Yeah , time is money . We really need to make good use of it . 

informal