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:       Want to send out for some Chinese ?  
 Person2:Some what ?  
 Person1:        Some Chinese food . I ’ m hungry , and there ’ s a take-out restaurant near here . We can have them deliver and then watch the news on TV while we eat .  
 Person2:No , I ’ d rather go out . The Chinese food here is rather different from what I had at home . Maybe we can try some other food today ... What about that all-you-can-eat place we passed the other day , the one over in the shopping center ?  
 Person1:        Okay . I could go for that . It ’ s called Al ’ s Steakhouse . They also have great fried fish , and I love their salad bar . You can go back to refill 1 your plate as often as you like .  
 Person2:Is that the place that serves such large portions of meat ?  
 Person1:        Yes , their steaks are enormous . Sometimes I can ’ t finish what I ’ Ve ordered .  
 Person2:What if that happens to me ? I hate to let food go to waste .  
 Person1:        Don ’ t worry . We ’ ll just get a doggie bag . 

formal