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:       Miss Green , do you have life insurance right now ? 
 Person2:No , I don't . I don't have a family , so I don't think I need it . 
 Person1:        This year our company is offering a new plan especially for single people like you . I think you might be interested . 
 Person2:Thank you , but I've never thought about it before . 
 Person1:        It's OK . I'll leave the pamphlet here . If you need more information , you can call me any time . 

formal