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:       I think this one will do .  
 Person2:I'm sorry . I don't think so .  
 Person1:        Why ? What's wrong with it ?  
 Person2:It's much too hard for his age . 

formal