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:       Where do you live now ?  
 Person2:I live in Haitian District where there are lot of universities .  
 Person1:        Which street do you live on ?  
 Person2:I live at No . 50 Xingu Street . 

formal