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:       How was the movie last night ?  
 Person2:I didn't really like it .  
 Person1:        Mary said that she was really pleased with the photography .  
 Person2:I found it very disappointing .  
 Person1:        She liked the acting , too , because that's what she wanted to see .  
 Person2:I wasn't happy with it .  
 Person1:        Nothing is to your satisfaction . 

informal