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:       Johnny , you did badly on the test . I think you haven't been studying enough . Am I right ?  
 Person2:Yes , Ms . Jones .  
 Person1:        Well , you'd better start studying harder if you want to pass this class . 

formal