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:       Our current apartment is valued at RIB 700,000 . We can sell it and put that money towards buying the new apartment .  
 Person2:Yeah , but we still need RIB 500,000 . Maybe we can use some of our savings to pay part of it .  
 Person1:        And we can take out a loan to pay the rest .  
 Person2:Great , so we can afford the new apartment after all !  
 Person1:        Uh huh ... but we're going to have to cut back on our shopping from now on . 

informal