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:       Honey , would you marry me ?  
 Person2:I want to think about it for some time .  
 Person1:        Please , honey , I have made proposals to you fifteen times .  
 Person2:I know . But your way doesn't touch my heart .  
 Person1:        Oh , god , please tell me how .  
 Person2:I can't tell you .  
 Person1:        OK , I want you to be happy when we are together , and when you are sad , I would always stay with you .  
 Person2:When I am angry and want to beat someone , you stand there and let me do what I want . Would you ?  
 Person1:        Yes , I would . Thanks for being in my life .  
 Person2:Don't be so happy , it is just one of my tests ! 

informal