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:       What a bother having to climb storeys home every day .  
 Person2:But it's also a sort of exercise and it's good to your health .  
 Person1:        I don't care !  
 Person2:You're complaining again . 

informal