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:       Excuse me . Can you tell me how to get started using these machines ? 
 Person2:Of course . Are you a new member here ? 
 Person1:        Yes . 
 Person2:Welcome . My name is Johnson . 
 Person1:        Nice to meet you . 
 Person2:Do you have any experience using weights ? 
 Person1:        No , I don't . So I need some help . 
 Person2:Well , first it is important to go through a good stretch.You must warm up properly so that you don't hurt yourself on the machines . 
 Person1:        Yes , I know that.Derek just led me through the warm up in the aerobics room.So I'm ready , I think . I can start using the machines . 
 Person2:Alright . Great . Then we must get a card for you . 
 Person1:        What do you mean--a membership card ? I already have one . 
 Person2:No . Not that . I mean a training card.The card allows you to keep track of how much weight you use on each machine.Here , let me show you . 
 Person1:        I'm ready . 
 Person2:Now , you can see that on this card there are all the machines listed.So , when you go through the series of twelve machines , you enter in the number of repetitions you do.And you also enter in the weight at which you set the machine . 
 Person1:        I see . So this card helps me to keep track of my progress . 
 Person2:Yes . And it also reminds you what is a suitable weight for each machine.Today , I will go through the machines with you one by one . I will show you how to use them.And we will determine what is a good starting weight for you . 
 Person1:        Alright . Great . 
 Person2:So you write your name and member number at the top of the card.And then , after you exercise each time , you file the card here . 
 Person1:        Great . Why don't we start on the machines ? 
 Person2:Are you alright ? Can you do more ? 
 Person1:        I'm sorry . I know there are still seven machines . But I'm exhausted . 
 Person2:That's okay . Don't worry.It ' s important not to push yourself . Especially not at the beginning . 
 Person1:        What can I do though ? I don't know the proper settings for the rest of the machines . 
 Person2:We can just go through them next time . It's no problem . Really.The most important thing is to know your limits.So if you feel burned out now , it is good to stop.Because if you strain a muscle or hurt your back , then you won't be able to exercise for a couple weeks . Right ? 
 Person1:        Yes . I suppose it's best to stop . 

formal