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'm afraid I have lost my air ticket while I was shopping .  
 Person2:I'm sorry to hear that.Did you check your shoulder bag carefully ?  
 Person1:        Yes , I checked again and again , but I can't find it . By the day after tomorrow , can I have the ticket reissued ?  
 Person2:I'm afraid you can't .  
 Person1:        I talked with the manager over the phone and he told me I can have it reissued because I have a copy of my lost ticket .  
 Person2:Oh , I see . I'll call the manager , then . 

formal