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 any idea for this vacation ?  
 Person2:Why don't we spend this vacation earning our tuition ?  
 Person1:        Oh , yeah , let's try to find some jobs .  
 Person2:OK . 

formal