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:       Mrs . Miller , you are an old friend of ours . In order to encourage future business and as a gesture of friendship , we are prepared to cut our price by 5 % . Will that satisfy you ? 
 Person2:That's great . Thank you for making this concession . I accept . 
 Person1:        Now I repeat , 5,000 transistor sets , specifications as shown in our catalogue at $ 20 each C . I . F . Los Angeles . 
 Person2:Good . Now that the price is decided on , we can discuss the packaging . 
 Person1:        As to packaging , we'll pack them two dozens to one carton , gross weight about 25 kilos a carton . 
 Person2:Carton ? 
 Person1:        Yes , corrugated cardboard boxes . 
 Person2:Could you use wooden cases instead ? 
 Person1:        Why use wooden cases ? 
 Person2:I'm afraid the cardboard boxes are not strong enough for ocean transportation . 
 Person1:        Cartons are comparatively light , and there fore easy to handle . They'll not be stowed away with the heavy cargo . Besides , we'll reinforce the cartons with metal straps . 
 Person2:All right . Carton or no carton , the packaging must be waterproof as well as strong enough to stand shock and rough handling . 
 Person1:        You needn't worry about that . Cartons are extensively used in our shipments to foreign countries and there have never been complaints from our clients . Now , as regards payment , we have agreed to use dollars , am I right ? 
 Person2:That's right . As soon as I get home , I'll see about the opening of the letter of credit . 
 Person1:        Please open the letter of credit 15 to 30 days before the date of delivery so that we'll have enough time to make all the necessary arrangements . Another thing , the L / C should be valid until the 15th day after shipment . 
 Person2:No problem . That can be done . I understand you'll ship the goods before the end of May ? 
 Person1:        Right . We'll ship the goods according to the agreed time schedule . Last , but not least , the inspection is to be carried out by Houston Commodities Inspection Bureau , which is final and binding on both parties . 
 Person2:Yes , we agreed to that . We have great confidence in your inspection institution . Through years of dealing with you , we've convinced of your commercial integrity . 
 Person1:        Thank you . You can rest assured that we'll do everything possible to prevent de festive commodities from going abroad . However , if there should be any disputes , we wish to have them settled through friendly discussions . 
 Person2:Exactly . That's what we have done in the past . 
 Person1:        Well , it seems we have covered everything . We'll have the contract ready in a couple of days . 
 Person2:Can you speed it up and let me have it today ? I'm leaving tomorrow . I've been here for almost a month now , you see . My corporation is urging me to return . I've booked the ticket for tomorrow afternoon's flight at 3 . 
 Person1:        Let me see . If we can't get the contract ready by then , we'll send it to you by airmail for your signature . 
 Person2:That's fine too . 

formal