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:       Excuse me , could you tell me how to get to the school clinic ? I've lost my way . 
 Person2:Yes . Go straight ahead till you come to the traffic lights , turn left there and it's the first turning on the right . 
 Person1:        Straight ahead to the traffic lights , left and then right . 
 Person2:That's it . It'll take you about five minutes . 
 Person1:        Thank you very much . 

informal