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:       What's all the security check about , Jimmy ? Does it mean the bar may be a dangerous place ?  
 Person2:No , of course not . Just in case . Nothing to worry about . Don't you also do this in China ?  
 Person1:        I don't know . Maybe the same . Actually , this is my first time being in a bar .  
 Person2:Oh , then it's my honor to be here with you . I can see now why you've been so curious about the bar . You like this place ?  
 Person1:        Sure . I love this place , especially the decoration . So tasteful !  
 Person2:Yeah . Other than that , the real feature is the excellent drinks . Can I have your ticket ?  
 Person1:        Here it is . But , what for ? We're already in .  
 Person2:Well , with the ticket , you can get a free drink . What would you like ? Orange juice ?  
 Person1:        Yes , orange juice will be fine for me . But how can you get the drink ? It's so crowded there around the counter . You can barely move .  
 Person2:I'll show you how . The bar tenders know whose turn it is . And also , I can snap my fingers to catch his attention .  
 Person1:        Cool . Thanks . ( Jimmy brings May a glass of orange juice . )  
 Person2:Oh , fresh juice , I love it . Well , I heard American people love hanging out in bars . Is that true ?  
 Person1:        Not everyone . But a lot of people do , especially the young . It's a fine place to spend an evening with friends or to make some new friends .  
 Person2:Interesting . Hey , look over there . The dance floor is already packed with people . Oh , the girl in red dances great .  
 Person1:        Yeah , a dancing queen . Wanna go and join them ?  
 Person2:Maybe later . I wanna take some photos first .  
 Person1:        OK . Let me help you to hold the drink .  
 Person2:Thank you . 

informal