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 Mark . What are you doing ?  
 Person2:Just watching some TV .  
 Person1:        Anything interesting on ?  
 Person2:Not really . Just watching the sports highlight on ESPN .  
 Person1:        So I take it you're pretty bored too .  
 Person2:Just killing time until I find something to do . What are you going to do ?  
 Person1:        It's Saturday and we are sitting at home doing nothing . What's wrong with us ?  
 Person2:You wanna shoot some hoops ?  
 Person1:        I already tried to call up some of the guys , but they are all busy .  
 Person2:Where's your girlfriend ? I thought you were going out with her today .  
 Person1:        She's out shopping with her friends .  
 Person2:Let's go to Starbucks and think of something to do then .  
 Person1:        Aright . Do you have any cigarettes ?  
 Person2:I only have a couple left . Why don't you pick some up on the way .  
 Person1:        Ok . See you there in about 30 minutes .  
 Person2:Aright . See you there . 

informal