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 Matt . I just got a job at a consulting firm . 
 Person2:Congratulations . That's great ! 
 Person1:        I'm so happy . I don't have to worry about finding a job and interviewing anymore . 
 Person2:When do you start ? 
 Person1:        I start next Monday . 
 Person2:You're going to have to put in a lot of hours you know . 
 Person1:        I know . I'm a little nervous , but it's pretty exciting . 
 Person2:I bet . You must be stoked . 
 Person1:        Yeah . I'm going to celebrate tonight . Wanna hang out ? 
 Person2:Sure . It's on you right ? 
 Person1:        Of course . How about Toby ? Should we call him ? 
 Person2:I don't know . He's a little depressed . He's having a hard time finding a job right now . 
 Person1:        I should still tell him . In the least , I can refer him to my company . It might help . 
 Person2:That sounds like a good idea . 

informal