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:       Where are we headed now ?  
 Person2:To a historic coffeehouse . It's got a little Mafia story to it .  
 Person1:        Awesome . Was someone killed there ?  
 Person2:Oh , yeah , while he was eating , and he was a pretty famous Don .  
 Person1:        Cool ! Is it safe for us to eat there though ?  
 Person2:Sure . In fact , nowadays , you'll see more tourists there than Italians . There are Mafia tours nowadays that go there to eat . 

informal