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 , Monica , congratulations ! Your presentation at the meeting was very successful and everyone was impressed by your speech . And it was so persuasive and I bet our clients will be convinced to invest their money in this project . You really made a big contribution to our company .  
 Person2:Thank you , I just tried my best . I am very happy to know you like it .  
 Person1:        You must have been prepared for a long time . Some statistics in this presentation are not easy to find , right ?  
 Person2:Well , yes . Several colleagues from different departments helped me with that . They are very supportive . I consulted an economic expert last week . He was very kind to give valuable suggestions .  
 Person1:        Now , the effort pays off . You have accomplished something .  
 Person2:Come on , don ’ t flatter me anymore . I took the job because I love being challenged . But I can ’ t get this turned around without the support from you people . 
A:
informal