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:       I really want to make a salad .  
 Person2:Do you know what kind of salad that you want ?  
 Person1:        I'm not sure what kind that I want .  
 Person2:I usually make a Caesar salad .  
 Person1:        Those taste really good .  
 Person2:Which kind of salad are you going to make ?  
 Person1:        I want a chicken salad .  
 Person2:I enjoy chicken salads .  
 Person1:        I like salads with croutons , almonds , and shredded cheese .  
 Person2:I really like how that sounds .  
 Person1:        Why don't you make a salad like that ?  
 Person2:I'm going to do that then . 

informal