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:       I wish you wouldn't play the TV so loud .  
 Person2:Sorry . Were you trying to sleep ?  
 Person1:        Yes , please ask when you want to borrow my records next time .  
 Person2:I'm sorry . You're right . I should have asked . 

informal