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:       Hello , Steven . Congratulations ! 
 Person2:Thank you . 
 Person1:        How's your married life ? 
 Person2:We're happy together now . We both think that we're a well-matched couple . 
 Person1:        That's very good . It's said that marriage is the Ab of love . But the words may not be right . 
 Person2:The situation differs in person . 

informal