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:       Where are you from , Laura ?  
 Person2:Well , my whole family is in the United States now , but we're from Costa Rica originally .  
 Person1:        Oh , so you're from South America .  
 Person2:Actually , Costa Rica isn't in South America . It's in Central America .  
 Person1:        Oh , right . My geography isn't very good ! 

formal