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:       Who stands out in your mind as a man or woman of sound character ? 
 Person2:If I think of famous people , I think of Abraham Lincoln . 
 Person1:        He's the US president , who walked five miles just to give a lady her change , isn't he ? 
 Person2:That's the one . He also was famous for never giving up on his goals . 
 Person1:        That's right . He ran for office quite a few times before he was finally elected . 
 Person2:And I also admire him for his courage in fighting for equal rights . 
 Person1:        He had great vision , didn't he ? 
 Person2:And humility . I would have liked to meet him personally . 

informal