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 mind if I get a lift in your car , please ? 
 Person2:I don ’ t see any problem ; only the car is a bit old . 
 Person1:        Oh you ’ re so kind ! 
 Person2:Get in . 

informal