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:       Kim ! I'm here ! I brought all my old maternity clothes plus Dave and Alice's baby clothes !  
 Person2:It's a little early for those , isn't it ? I still have eight months to go ...  
 Person1:        Believe me , the time will fly by ! Before you know it , you'll be changing diapers ! You have to start preparing !  
 Person2:I thought we could turn the upstairs study into a baby room . What do you think about lavender ?  
 Person1:        I'll be back tomorrow with my work clothes and a gallon of lavender paint ! You just sit back and relax ! 

informal