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:       Nick ! How ’ s it going ? 
 Person2:Oh , hey ... 
 Person1:        What are you doing in this neighbourhood ? Do you live around here ? 
 Person2:Actually , my office is right around the corner . 
 Person1:        It was great to meet you last week at the conference . I really enjoyed our conversation about foreign investment . 
 Person2:Yeah , yeah , it was really interesting . You know , I'm in a bit of a hurry , but here ’ s my card . We should definitely meet up again and continue our discussion . 
 Person1:        Sure , you still have my contact details , right ? 
 Person2:You know what , this is really embarrassing , but your name has just slipped my mind . Can you remind me ? 
 Person1:        Sure , my name is Ana Ferris . Don ’ t worry about it . it happens to me all the time . I ’ m terrible with names too . 

formal