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:       Hello . Mr . Rodriguez ? 
 Person2:Yes . Is this Paula ? 
 Person1:        Yes , sir . I ’ Ve just dropped those slides off at the Winthrop office . Do you need anything else while I ’ m out ? 
 Person2:No , that ’ s all right . Paula . Why don ’ t you get something to eat , and I ’ ll see you this afternoon . 

formal