You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Sentence1: I leave on Tuesday and need to arrive by 11:30. Sentence2: I need a train that goes to Cambridge and departs from Bishops Stortford. Sentence3: I would recommend the lensfield hotel. It's a 3 star hotel in the south. Would you like more information or do you want to go ahead and book a room? Sentence4: The TR0635 leaves at 09:29, tickets cost 10.10 pounds and the duration of the journey is just 38 minutes. Would you like me to book you a seat? Sentence5: What time does the train depart? What is the price and total travel time? Sentence6: No but I also need a place to stay that should be in the expensive price range and should include free wifi. Sentence7: Nope, wherever you recommend will be great. THanks Sentence8: We have 5 hotels that meet your criteria. Is there a particular area of town you would like to stay in? Sentence9: Yes can you please do that for me? Sentence10: No, that will be all. Thank you! Sentence11: How many people should I book this for? What day? How many days will you be staying? Sentence12: ok, the booking was successful. Reference number is : N9Y9Q569 . can i help with anything else? Sentence13: Enjoy your stay. Sentence14: Book it for 8 people and 4 nights. We will be checking in on Thursday. Sentence15: What day will you be departing and time? Sentence16: Ok, the TR0635 arrives at 10:07. Question: Who has spoken the sentence 12? (A) User (B) System
Answer: (A) User

Sentence1: Of course, when would you like your reservation to be and for how many people? Sentence2: Do you have a area preference? Sentence3: No that will be all. Sentence4: Excellent, I have booked you a table for 6 at 17:00. Tables are reserved for 15 minutes. The reference number is RI11SSDU . Sentence5: Does it have free wifi? Sentence6: Acorn guest house matches your requirements, would you like to book there? Sentence7: Do you need anything else? Sentence8: What are my choices for a moderate hotel? I don't need free parking. Sentence9: The hotel does have internet. Sentence10: I have results for 18 moderately priced places, what area are you looking to stay in? Sentence11: Great can I get their address, phone number, and postcode? Sentence12: I would like to make a reservation at Hotel Du Vin and Bistro. Sentence13: I have 2 European and 2 Modern European. Do you have a preference? Sentence14: Thank you for contacting Cambridge TownInfo Centre, enjoy you hotel stay and your dinner! Sentence15: I would like the restaurant to be in the Centre and serve European food. Sentence16: The acorn guest house is located at 154 chesterton road, postcode cb41da and the phone number is 01223353888. Sentence17: Yes, in the centre. Sentence18: Six people on Wednesday, at 17:00 Sentence19: Thank you so much for all your help! Sentence20: I am also looking for a restaurant. The restaurant should be in the same price range as the hotel and should serve European food. Sentence21: No particular area, I need a hotel with a 4 star rating. Sentence22: There are 2 to choose from: Hotel Du Vin and Bistro, and Galleria, and there are 2 others that are similar, but serve modern european. Do any of these sound good? Question: Who has spoken the sentence 10? (A) User (B) System
Answer: (A) User

Sentence1: Find me a college in the centre, please. Sentence2: I also need a taxi to go between the two places. Sentence3: Any criteria come in mind for the restaurant as far as price, location, type of food? Sentence4: I was able to successfully book you for 2 at 18:45 on Tuesday at Galleria. The reference number is MWT848BZ . The table will be reserved for 15 minutes. Sentence5: Would like to dine somewhere with a moderate price range. Sentence6: What time would you like to leave? Sentence7: Sure, look for a white Tesla. The reference number is 07472267746. May I be of further assistance to you today? Sentence8: The Oak Bistro is a nice British Restaurant in the centre. Does that sound appetizing? Sentence9: Does that serve European food? Sentence10: Sounds good. I need it for 2 people at 18:45 on Tuesday. Sentence11: Yes, I'd like a table for 2 on Tuesday at 18:45 if that's possible. Sentence12: Yes it does serve European food. Would you like me to book it? Sentence13: Entrance fee is just 1 pound. Their phone is 01223338400 and post code is cb21tq. Does that sound good to you? Sentence14: Yes thank you. I'd also like to find a restaurant in the same area. Sentence15: Maybe Trinity College. What's their entrance fee, phone number, and what postcode are they in, please? Sentence16: I can schedule a taxi for you from here, I can book one for the closest time to 18:45. Sentence17: I just want to make sure the taxi arrives at the restaurant by the booked time. When would you recommend I schedule the cab? Sentence18: My apologies. The Oak Bistro is a British restaurant, but if you want a restaurant that specializes in European food, I'd suggest Galleria. How about booking that? Sentence19: No, that is all that I needed. Thank you for your help! Sentence20: There are thirteen to choose from. Downing College is nice, and of course there's always Trinity College. Can I get you more information about them, or one of the others? Sentence21: Thank you for contacting Cambridge TownInfo centre. Goodbye! Sentence22: Great, can I get the contact number and the car type? Question: Who has spoken the sentence 8? (A) User (B) System

Answer: (A) User