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:       Wow ! You look like a drowned rat ! Didn't you know there is a thunder-storm today ?  
 Person2:I knew there would be a shower , but I didn't realize it would rain cats and dogs today .  
 Person1:        Well . You'd better take a hot shower right now , or you will catch a cold .  
 Person2:I know . I don't want to get sick , especially during finals week . 

informal