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:       Daniel , would you like to have a look at my dorm ?  
 Person2:Of course , I'd like to .  
 Person1:        It is a small room , just for 4 people .  
 Person2:What is in it ?  
 Person1:        It only has 4 beds and 4 writing desks , but it is spacious and bright .  
 Person2:Do you get along with your roommates ?  
 Person1:        Of course . They are very friendly .  
 Person2:Which floor are you on ?  
 Person1:        We are on the 5th floor , and there's a very nice view from the balcony .  
 Person2:Oh , you can climb the stairs as a workout .  
 Person1:        Yes , that's a good idea .  
 Person2:Wow , your roommates are cleaning the room .  
 Person1:        Let's give them a hand . 

formal