instruction:
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'.
question:
Person1: We've got a problem ... it looks like we'll need more spotlights on the exhibition booth . The client thinks it's too dark , and they want to add halogen lighting . We've already got 3 sets of track lighting from you guys , do you think you could help us out and throw in some halogens ?
Person2:Oh ... Um ... I don't think so . you know the halogen lighting is much more expensive than your track lighting system . Plus I'm going to have to call in some guys to install it for you . That's not going to come cheap .
Person1: But it would only be adding to the existing structure . We're not talking about anything new here ...
Person2:It doesn't matter because we will still have to call the electrician out , and they are union labor . It'll cost you a pretty penny ...
Person1: How much do you think it would cost ?
Person2:Mumm , I estimate it'll run in the neighborhood of ... $ 500 per light .
Person1: $ 500per light ? ! That's ridiculous ! It can't possibly be that expansive !
Person2:It is , I'll tell you why . We'll have to call in the electrician , he's going to charge overtime now because it's already 5PM , and it will probably take him an hour a light . Plus , the halogen lights take more electricity , so your electrical cost is going to be higher as well .
Person1: Can't you give me a break on this ? We've already spent so much money on lighting , I hate to have to blow so much more on halogens .
Person2:No , that's the cost , and that's what it's going to cost us . We can't go in the hole with this . I am giving you my best price , so take it , or leave it .
answer:
informal

question:
Person1: I think he deserved his gold .
Person2:Did you see his last dive .
Person1: Yes , it's perfect !
Person2:He's diving for the gold .
answer:
informal

question:
Person1: Well , we've settled the problems of price , quality and quantity . What mode of payment do you wish to employ ?
Person2:Irrevocable letter of credit , of course . It's the normal terms of payment in international business .
Person1: Could you adopt D / A or D / P ? You see I have to pay a deposit when I open a letter of credit . That will tie up my funds and add to the cost of my imports , especially for such a huge order .
Person2:You might consult your bank and see if you could reduce the required deposit to a minimum .
Person1: Anyhow , there would be certain bank charges . We've done business for years and you should have some faith in our credit . It would help me greatly , if you could accept D / A or D / P . It makes no difference to you , but it does to me .
Person2:Well . As you understand , the irrevocable L / C gives the exports additional protection of the banker ' s guarantee . We always ask for L / C for our exports , and the other way around , we pay by L / C for our imports . We only accept L / C for regular orders .
answer:
formal