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:       Hey John . I have some great news .  
 Person2:What happened ?  
 Person1:        I got a job offer from Dell .  
 Person2:That's great . I thought you said you didn't get the job .  
 Person1:        I thought I did bad on the interview , but I guess I was wrong . I'm so happy right now .  
 Person2:I bet . That's great news . I'm very happy for you .  
 Person1:        Thanks . I feel like celebrating . Let's go have a beer . It's on me .  
 Person2:Sounds good . 

informal