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 like a package tour or to travel alone ?  
 Person2:I prefer a package tour , and we don't have to worry about accommodation , meals or that sort of trivial demanding things .  
 Person1:        I prefer travel alone . I'll have a lot of time lingering at one place . 

formal