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:       You look run down , Brian .  
 Person2:I've been feeling under the weather recently . I caught a bad cold last week , and I still haven't got over it .  
 Person1:        Well , you wanna take a sick leave ? All you need now is a good , long rest .  
 Person2:I guess so . Even though I seem to be over the worst of it . I don't want to give the bug to anyone in the office .  
 Person1:        Good idea . 

informal