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 do I look ? I love these braids . They're fun !  
 Person2:They look great ! Hey , are you hungry ? I know a good Ethiopian restaurant-Meskerem .  
 Person1:        An Ethiopian restaurant ? Whoa ! I always think of starving people in Ethiopia .  
 Person2:It's very “ in ” these days . Some of the places are really expensive .  
 Person1:        That's so ironic ! Well , what's it like ? Is it your traditional food ?  
 Person2:No . Africans and African-Americans are different in many ways . Our food's different , too . 

informal