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:       Hi , Ellen ! How is it going ? 
 Person2:Can ’ t be better ! Bob , aren ’ t you glad the semester is over ? 
 Person1:        Yep ! Are you going to the rock concert Friday night ? 
 Person2:I didn ’ t think much of it . Are you ? 
 Person1:        Sure . Would you like go with me ? 
 Person2:Sounds like fun . 
 Person1:        You ’ ll have to buy your own ticket though . 
 Person2:Are you broke again ? Let me treat you . 
 Person1:        Wow ! When did you come into so much cash ? 
 Person2:You know , I am a waitress at the student center . Anyway now those final exams are almost over . I ’ d love a night out . 
A:
informal