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:       How often do you have English lessons ? 
 Person2:I have a lesson once a week but I try to practice every day . 
 Person1:        How do you practice ? 
 Person2:I usually look at English language websites every day and go to my local English Corner twice a week . 
 Person1:        Do you ever speak to native speakers of English ? 
 Person2:Sadly , I hardly ever speak to English people . I usually practice with my Chinese friends . 

formal