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:       All right , Mr . Crane , when will you be arriving in the city ?  
 Person2:I should be coming in on the 11:30 mooring flight . How far is the office from the airport ?  
 Person1:        Only 25 minutes or so . We ’ ll send somebody to meet you . That ’ s 11:30 a . m . Friday the 15th ?  
 Person2:That ’ s right . I ’ ll be in the baggage area . 

formal