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'.

Example input: Person1:      Hey man , you wanna buy some weed ?  
 Person2:Some what ?  
 Person 1:Weed ! You know ? Pot , Ganja , Mary Jane some chronic !  
 Person2: Oh , umm , no thanks . 
 Person1:      I also have blow if you prefer to do a few lines . 
 Person2: No , I am ok , really . 
 Person1:      Come on man ! I even got dope and acid ! Try some ! 
 Person2: Do you really have all of these drugs ? Where do you get them from ? 
 Person1:      I got my connections ! Just tell me what you want and I ’ ll even give you one ounce for free . 
 Person2: Sounds good ! Let ’ s see , I want . 
 Person1:      Yeah ?  
 Person2:I want you to put your hands behind your head ! You are under arrest ! 
Example output: informal
Example explanation: Based on the conversation, we can see that there is a presence of exclamation which is not present in a formal discussion. Therefore this is an informal conversation
Q:  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 . 
A:
formal