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:       How is grandpa doing recently ? 
 Person2:Not good . The doctor told him not to smoke again , but it just rolls off him like water off the duck ’ s back ! 
 Person1:        Maybe I would talk with him someday . 
 Person2:I hope it will be of some use . 

formal