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:       It's hard to get tickets for the movie . 
 Person2:Did you get any ? 
 Person1:        Yeah , two at the tenth rows . 
 Person2:How much is the ticket ? 
 Person1:        3.5 dollars each . 

formal