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:       hi , Meally , do you know that guy over there ?  
 Person2:The tall one ? Sure , that's Drive , he works with Lily .  
 Person1:        He is cute . What dose he do ?  
 Person2:I'm not sure , he is a manager I think .  
 Person1:        Really ? Are you going to introduce us ?  
 Person2:Well , he has already taken you know , that's his wife right there . 

informal