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:       Do you have cruise tours ? 
 Person2:Yes , sir . We have the all-inclusive luxury cruise . Maybe you would like to look at the itinerary . 
 Person1:        Sure . That's really amazing . However I don't have so much time . Do you have a full day cruise ? 
 Person2:Yes . What about this one ? 

formal