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:       Good morning , Miss . 
 Person2:Morning . Can I help you ? 
 Person1:        Yes . I'd like to know how to use the library . You know , I'm a new student here . 
 Person2:All you need is your student identification card to check out books . 

formal