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:       Can you believe that Susan got married ? 
 Person2:Really ? I remember she said if she would remain single . Is the man very rich ? 
 Person1:        No . That ’ s what is surprising me . 
 Person2:You means she didn ’ t marry a rich man . 
 Person1:        He ’ s a postman . 
 Person2:I thought she would marry a fortune . 

informal