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:       Could you show me some scarves ?  
 Person2:What kind of scarf shall I show you ? We have them in all sorts and sizes .  
 Person1:        Show me some of the latest fashion , please .  
 Person2:At your service . Will this suit you ?  
 Person1:        Yes , it will ; this must be the foreign produce .  
 Person2:This is Chinese made .  
 Person1:        Let me try it on . I think it really suits me . Can you give me some discount on it ?  
 Person2:Yes , it ’ s already fifty yuan off the original price .  
 Person1:        But that still sounds expensive .  
 Person2:Sorry , we can ’ t come down any more . 

informal