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 Mary . I haven ’ t seen you for ages . Are you still seeing Paul ? 
 Person2:No . We broke up last month . I ’ m taking a break from dating for a while . 
 Person1:        Did you break up amicably ? Sometimes couples row a lot before splitting up . 
 Person2:We just decided to stop seeing each other . It was all very amicable . Are you still going out with mike ? 
 Person1:        Yes , I am . We ’ re thinking about getting engaged . We ’ Ve been dating for over a year now . 
 Person2:Good for you ! Have you seen Kelly recently ? Is she still dating nick ? 
 Person1:        I havn't seen her for a while.She stopped seeing nick because he was cheating on her.He was seeing a girl form his office.One day , she saw them holding hands and ended the relationship immediately . 
 Person2:She was right to do that . I heard the Neil and Tina getting married soon . 
 Person1:        Really ? They ’ Ve been together for a long time . When are they getting married ? 
 Person2:I think it ’ s 26th September . I ’ ll check and make sure that Tina remembers to invite you to the hen night . 
 Person1:        Thanks . Hey , look at that guy over there . I think he fancies you . 
 Person2:He certainly looks interested , doesn ’ t he ? Shall we invite him over to our table ? 

informal