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:       They got a divorce at last .  
 Person2:It's inevitable . Their love wasbuilt on the sand , and this is why their marriage has landed on the rocks .  
 Person1:        You said it . Love but on the sand will soon be on the rocks .  
 Person2:That give us a good lesson . 

informal