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:       When do you want to have the open house party ? 
 Person2:How about next Friday ? 
 Person1:        Friday sounds good . 
 Person2:How do you feel about hiring that clown to come and entertain the kids ? 
 Person1:        I like that . Then the adults will be more free to mingle and relax . 
 Person2:That's what I was thinking . 
 Person1:        I'm so excited . Finally , a yard of my own . 
 Person2:Do you feel like a king in your castle ? 

informal