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:       Did you do anything fun over the weekend ?  
 Person2:I didn't want to go out last weekend , so I decided to stay at home and watch a movie .  
 Person1:        Why didn't you want to go out ?  
 Person2:I was very tired after working all week . Sometimes on the weekend I don't have enough energy to go out to a movie theater .  
 Person1:        Did you download a movie or rent it at the store ?  
 Person2:I downloaded it so that I didn't have to remember to return it . 

formal