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:       Lucy , where are you going ?  
 Person2:I want to go to the supermarket .  
 Person1:        Wait a few minutes and I'll go there with you .  
 Person2:Let's get a shopping cart .  
 Person1:        Good idea  
 Person2:What are you going to buy ?  
 Person1:        Let's check out the fruit section first .  
 Person2:OK . I'd like some oranges . But they don't look quite ripe yet .  
 Person1:        Look , nice fresh cherries ! They are ripe and soft . I'll take some .  
 Person2:I'll take some , too .  
 Person1:        Let's go to the snacks section . I want some chocolate and sweets .  
 Person2:OK . I'll go and buy some cakes .  
 Person1:        Do you want to buy something else ?  
 Person2:No . Let's go over to the check-out stand . 

informal