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:       I ’ Ve gotta hand it to you , you really did a good job !  
 Person2:So glad that you think so !  
 Person1:        I think you deserve a promotion .  
 Person2:Oh , really ? Thanks a lot ... well , I still have a lot to learn , I guess . 

informal