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:       I'm really tired of my job in the bank . I'm thinking about changing it .  
 Person2:Have you any definite idea ?  
 Person1:        Not yet , what's your opinion ?  
 Person2:I think you'd better try an active job . 

informal