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:       Good morning miss . Wang 
 Person2:Good morning Mr . Li 
 Person1:        It ’ s a beautiful morning isn ’ t it ? 
 Person2:Oh . It ’ s a nice day indeed 
 Person1:        I hope it won ’ t be too hot , I can ’ t stand the heat 
 Person2:Really . For me too . 

formal