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:       Steve . Is that you ?  
 Person2:Yeah . What's going on ?  
 Person1:        Not much . What a surprise to see you here .  
 Person2:Yeah . It's been a couple of months since I saw you .  
 Person1:        What have you been up to ?  
 Person2:I just started working out .  
 Person1:        Really ? Where do you work out at ?  
 Person2:I joined the Samsung Health Club last month .  
 Person1:        What do you mostly do during your workout ?  
 Person2:I concentrate mostly on my legs , chest , arms and stomach .  
 Person1:        I should start exercising more .  
 Person2:It's hard work while exercising , but it is a great feeling when I get done .  
 Person1:        I have a running machine at home . I used to use it , but I already got sick of it .  
 Person2:Exercising at home is hard . The environment is not suited for exercising .  
 Person1:        If I want to exercise , I will need to join a gym .  
 Person2:I have a couple of guest passes . You want to check out my health club ?  
 Person1:        That's a good idea . Let's go over the weekend .  
 Person2:Great . I'll call you Saturday morning .  
 Person1:        Aright . I'll talk to you later .  
 Person2:Ok . Bye . 

informal