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:       I'm glad we came here . This is really delicious ! 
 Person2:I was worried you would think it was too far to drive . 
 Person1:        Well , it's true I've never driven two hours just to get lunch.But really , I think it's worth it . 
 Person2:I think if you try some more authentic Chinese food , you might understand how we students from Taiwan suffer . 
 Person1:        How do you mean " suffer " ? 
 Person2:I mean , in Milwaukee there is no good Chinese food.So we miss the food in Taiwan too much.Sometimes we just have to drive down here to Chicago to find something better . 
 Person1:        Even in the winter ? 
 Person2:Yes , even in the winter . 
 Person1:        And even if it takes two hours , huh ? 
 Person2:Why not ? I've been craving good food for three weeks now . I'm too sick of hamburgers and pizza ! 
 Person1:        Well , this really is delicious , I have to admit . I can understand better now why you and your friends are always whining . 
 Person2:Don't tease me ! Good food is really important to Chinese ! 
 Person1:        I know . I can see that . This is what is called " dim sum , " right ? 
 Person2:Yes , all these dishes are different " dim sum " dishes.You can't find this kind of thing except for in a few cities in America . 
 Person1:        So when you Chinese think of Chinatown , you mostly think of food . Is that right ? 
 Person2:Of course . I will try to buy some things at the Asian grocery down the block too.Then I can do a little cooking in my apartment . 
 Person1:        And maybe we can go to a good Italian restaurant for dinner , after the museum.Chicago has some great Italian restaurants . 
 Person2:No way ! 
 Person1:        What do you mean ? 
 Person2:We're going up to the " new " Chinatown for dinner . I already know where we're going to go . 
 Person1:        Alright , alright . I am happy to try more Chinese food.Will it be dim sum again ? 
 Person2:No , dim sum is usually eaten around lunch time , or sometimes closer to breakfast.We ' ll try more Taiwanese style up at the " new " Chinatown . 
 Person1:        Taiwanese style ? Isn't dim sum Taiwanese style ? 
 Person2:No , dim sum is more Cantonese style.But of course you can buy it in Taiwan . 
 Person1:        I wonder if you can cook things this good . 
 Person2:I'm a great cook actually . You will see . 

informal