Q: 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'.
 Person1:       Excuse me , could you tell me how much is the ticket ?  
 Person2:It is free on weekend .  
 Person1:        That's great !  
 Person2:Here is a guiding plan . 
A:
informal