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:       Can I help you , Miss ?  
 Person2:Yes . I have just got lost with my firiend.Can you page my friend for me ?  
 Person1:        OK , tell me your friend's name .  
 Person2:Here is his passport.Thank you very much . 

informal