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:       Darling , can't you stay for a few more days ?  
 Person2:I can't . I've got to attend a meeting in London .  
 Person1:        I'm really going to miss you.Take care of yourself .  
 Person2:I will . 

informal