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:       May I see your passport please ?  
 Person2:Yes . Here it is .  
 Person1:        Are you travelling for business or pleasure ?  
 Person2:I'm going to visit some relatives here for several months .  
 Person1:        Do you have anything to declare ? Jewellery or cash ?  
 Person2:The only things I brought were some cloths and my notebook computer .  
 Person1:        Did you bring any fruits , vegetables , fresh meats or plants into this country ?  
 Person2:No , Sir , I did not . 

formal