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:       Do you like chocolates ?  
 Person2:It depends .  
 Person1:        Do you like coffee ?  
 Person2:Um . It ’ s delicious .  
 Person1:        And do you like English food ?  
 Person2:Not all of it . 

formal