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:       How do Mark and Jones compare , in your opinion ?  
 Person2:Generally speaking , Mark's personality is much more agreeable than Jones  
 Person1:        May I venture to ask if you've decided to employ Mark ?  
 Person2:Possibly . 

formal