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:       David , do you think we are lucky to have the weekend ?  
 Person2:Definitely . I need to have enough time to have a rest on this weekend . We worked like bees in the whole working days .  
 Person1:        I agree with you . What do you want to do , except sleeping ?  
 Person2:Let me think . Oh , awful ! I still have not finished the chart which was assigned by Mr . Wharton on Friday . So that task will make my busy .  
 Person1:        I am better . I will go out to have a visit to my aunt . Why don't we have fun on weekend ?  
 Person2:So what ? 

formal