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:       Good afternoon . “ ginger ’ s restaurant ” . May I help you ?  
 Person2:Yes . I ’ d like to book a table for Friday evening please .  
 Person1:        Certainly . For how many people ?  
 Person2:We ’ ll be eight or nine people . Could we book a private room ?  
 Person1:        I ’ ll just check . At what time on Friday evening ?  
 Person2:About 7 thirty .  
 Person1:        Yes . That ’ s fine . We can book you a private room for up to ten people at that time . Could you give me your name please ?  
 Person2:My name is Jenkins . My phone number is 7539738 2 . that ’ s confirmed then . 7 thirty on Friday .  
 Person1:        Yes . Do you intend to order a Lacarne or will you be having our seafood buffet ?  
 Person2:Oh , we ’ d like the buffet please . We ’ Ve heard it ’ s very good . 

informal