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:       Excuse me , I am Dunlin . I am here about your advertisement for a tourist guide . Are there still any vacancies ?  
 Person2:Yes . One more is needed .  
 Person1:        Oh , I'm so lucky . I want to apply for it .  
 Person2:But do you have any experience like that ?  
 Person1:        Yes . I have been a guide for two years .  
 Person2:OK.Then I want to ask you some questions about the tourist guide.If there wasn accident , for example a tourist falls ill , what would you do ?  
 Person1:        I think I will call the office to send someone to meet us , and escort that person to the nearest hospital without interrupting our trip .  
 Person2:If one of them forgot a camera in a restaurant , would you let the tourist bus go back ?  
 Person1:        No . In fact , prior to their boarding the bus and their getting off the bus , I will make an announcement to remind them that they should check their belongings .  
 Person2:Well , it seems that you have all the practical experience to handle these cases . I am very glad to welcome you into our company .  
 Person1:        Thank you . It's my honor . 

formal