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:       We can go to the cinema or say at home watching TV , what's it to be ?  
 Person2:As far as I'm concerned , staying at home is more comfortable than going to the movies .  
 Person1:        Thanks , dear . I feel so tired after a whole day's work . 

formal