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 , you look very tired . 
 Person2:Yes , I nearly didn't sleep last night . 
 Person1:        Did you hold a party or something else yesterday ? 
 Person2:No , I just watched Supergirl , and it began too late in the night . I was too excited to get asleep after one o'clock . 
 Person1:        I don't like this program , because there are too many constant arguments between the judges . 
 Person2:The contestants are different . These girls perform in free styles . 
 Person1:        Do you have much time watching TV ? 
 Person2:I think less than 3 hours . This year I didn't watch any entertainment programs . Too many ads between the programs . I prefer listening to the radio . 
 Person1:        I don't like ads , either . But ads could bring big profits to the TV station . 
 Person2:If they could make beautiful ads , I could bear . 

formal