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 are you getting along with your paper ?  
 Person2:I haven't finished it . It is very difficult .  
 Person1:        You should hand it in before next Sunday .  
 Person2:Oh , I know . I will try my best .  
 Person1:        I believe you can do a good job . 

formal