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 bring some lunch with you ?  
 Person2:Yes , I packed it myself .  
 Person1:        Wow , that looks beautiful .  
 Person2:It's my health-conscious lunch , good for my health and beauty .  
 Person1:        I might try it myself . 

informal