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:       I visited the famous variety show host , Dennis .  
 Person2:What's he like ?  
 Person1:        Oh , he's a very serious person .  
 Person2:You must feel very uneasy at his home . 

formal