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:       Our major is from a bigger city .  
 Person2:He ’ s doing fine . A new broom sweeps clean .  
 Person1:        He brings with him some talented people from his former city .  
 Person2:I think we ’ ll benefit a lot . 

informal