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:       Your house is too small . Why not buy a big one .  
 Person2:I do wish I could afford one .  
 Person1:        You can get a loan from the bank . You know LPF program provides low cost loans for participants home purchases .  
 Person2:Of course I know that . But don't you notice that the house price is skyrocketing ? 

formal