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:       Can I help you ?  
 Person2:I'm looking for a Sharp DVD Player .  
 Person1:        Sure . Any particular model ?  
 Person2:Yes . The DS102 series .  
 Person1:        Oh , I'm afraid we've sold out of those . They were really popular .  
 Person2:Will you be getting more in .  
 Person1:        Yes . But not for about 2 weeks . 

informal