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:       Will you be checking in any baggage today ?  
 Person2:Yes , I have two large suitcases and one box .  
 Person1:        If you need baggage tags , they are found in the box on your right .  
 Person2:No , thank you.They are already tagged with my name and address .  
 Person1:        You are allowed an additional two carry-on items .  
 Person2:Good , I have my backpack and my camera tripod .  
 Person1:        I see . All carry-on items must be able to fit under the seat or in the overhead bin .  
 Person2:Both my items will fit under the seat or in the overhead bin .  
 Person1:        You will need to send the tripod as luggage because it is too long to fit in our gauge box for carry-on items .  
 Person2:I cannot let anything happen to that tripod.Can you guarantee it will not be damaged if I check it in ?  
 Person1:        No , I can't . Perhaps your stewardess will help you to find a place to store it .  
 Person2:Good idea . I will ask the stewardess to help me store my tripod . 

formal