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 do you want to eat today ?  
 Person2:I feel like having some dumplings . Let's go out to eat .  
 Person1:        No need ! I know how to make dumplings . Let's do it from scratch . Can you give me a hand in the kitchen ? I don't think I can finish everything by myself .  
 Person2:Of course . What do you want me to do ?  
 Person1:        Just trim vegetables for cooking . I will cut up the meat .  
 Person2:I can do that . And I would like to make dumplings later .  
 Person1:        Yeah , you are my good helper , Steven .  
 Person2:Absolutely . 

informal