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:       John , did you have a dream when you was a little boy ? 
 Person2:Of course I did . I dreamed to be a pilot when I grow up . But unfortunately , I didn ’ t realize it . 
 Person1:        I had the same experience with you . When I was a little boy I dreamed to be a great scientist . But now you see , I'm just a common office clerk . 
 Person2:Okay , forget about that . S , do you have some practical dreams at present ? 
 Person1:        I do . And now I'm working hard to learn English , and I want to be an interpreter some day . 
 Person2:You're promising . Just follow your dream and never give up . 
 Person1:        Thanks , I will . 

informal