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:       Do you have a bf ?  
 Person2:Yes , I had a bf before .  
 Person1:        Why you say bf before ?  
 Person2:We parted from each other last month .  
 Person1:        Have you got a new one ?  
 Person2:Mmmm , no . How about you ?  
 Person1:        I am single , I have no real of , only an E-gf , that is you .  
 Person2:Haha , so you are my E-bf .  
 Person1:        I like you . Do you agree to be my of ?  
 Person2:Mmmm . .. OK , let's try to be .  
 Person1:        Wow ! Blablablabla . . .  
 Person2:Hey ! What is it ?  
 Person1:        I am flying like a bird .  
 Person2:LL  
 Person1:        I am so happy . I want to drink a cup of champagne .  
 Person2:I have no champagne right now . How about this ?  
 Person1:        It's OK , so I send you this .  
 Person2:Is it made of chocolate ?  
 Person1:        It's my heart ; it's made of what you like .  
 Person2:Oh , I will have a sweet dream .  
 Person1:        Are you sleepy ?  
 Person2:A little bit . I have to go to sleep though I don't want to .  
 Person1:        Yes , I do not want to see ur sleeping in the office .  
 Person2:Thx.Bye for now . Kisssssssssss .  
 Person1:        C U here , honey . 

informal