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:       She is , like , mega-intense , isn't she ?  
 Person2:Ha , she is unstoppable . I'm learning so much from her .  
 Person1:        What's it like to work with her ?  
 Person2:She's demanding . But I like that . I mean , I know our timeline is tight .  
 Person1:        Tell me about it .  
 Person2:You guys are working around the clock , I know . That guy Dave next to Zina never leaves .  
 Person1:        Vince wants us to have everything debugged and ready to go by the end of the month . 

formal