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 .  
 Person2:My goodness ! It ’ s the afternoon ? Doesn ’ t the time fly ! Do come in and sit down .  
 Person1:        Thank you .  
 Person2:What ’ s the time ? My watch has stopped .  
 Person1:        It ’ s half past twelve .  
 Person2:When do you have lunch ?  
 Person1:        From one to two .  
 Person2:What do you normally eat ?  
 Person1:        We usually go to the cafeteria .  
 Person2:Oh , it ’ s time to have lunch now .  
 Person1:        let ’ s go together . 

informal