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:       How about going swimming ? 
 Person2:Ok . Where should we go ? 
 Person1:        Why don ’ t we down to the pool ? It ’ s not too far from here . 
 Person2:Fine . I ’ ll be ready in a minute . 

formal