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:       Uh ... that's Greek to me .  
 Person2:That means they have tapered legs .  
 Person1:        Well , mine are baggy . They're the kind of pants you can lounge around in .  
 Person2:Mine are , too .  
 Person1:        So maybe we shouldn't go out after all .  
 Person2:Yeah . Let's just lounge around ! 

informal