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

Sentence1: 1 person, plese. Sentence2: Sorry, I couldn't find any restaurants that fit that criteria. Sentence3: O booked you at 12:15 to give you extra time, look for a red tesla, they cbr at 07079296786, any other questions? Sentence4: Okay, you're all set with a reservation at La Tasca on Wednesday at 12:30! The reference number is F8VGULKB . Sentence5: Are there any Spanish restaurants available? Sentence6: What time would you like to leave or arrive? Sentence7: I'm sorry, I forgot some of my friends couldn't make it. It will just be myself, and I need the reservation for Wednesday. Sentence8: I have you booked at the Acorns Guesthouse the reference number is QQ2N4M7W . Can I help you with anything else today? Sentence9: I need help finding a 4 star hotel Sentence10: Sorry to tell you this but we actually have no Jamaican restaurants in cambridge. Maybe you would prefer another type of food Sentence11: La Tasca is at 14 - 16 Bridge Street, CB21UF. La Raza is at 4 - 6 Rose Crescent, CB23LL. Would you like a reservation at one of them? Sentence12: That is all I need, thank you, goodbye! Sentence13: Is there one in the centre of town maybe? Sentence14: Goodbye and thank you for using our service! Sentence15: Yes, please. I would like its address and postal code. Sentence16: La Tasca sounds interesting, can you book a table for my group at 12:30? Sentence17: How many people are in your group? Sentence18: no, but I need free parking and wifi. Sentence19: I have 19 hotels in Cambridge that fit those requirements. Do you have a price range in mind? Sentence20: nah, I just need it for 4 nights starting from wednesday. maybe look at moderately priced hotels? Sentence21: I have several listed is there a particular area you would like? Sentence22: I would want to be able to arrive to the restaurant by the time booked, 12:30! Sentence23: How many of you will be staying there? Sentence24: Yes, please. I'm looking for a jamaican restaurant that is moderately priced. Sentence25: There are two spanish restaurants. Would you like more information? Sentence26: i also need a taxi to commute between the two places Question: Who has spoken the sentence 12? (A) User (B) System
Answer: (A) User

Sentence1: Can you book a table at the Bistro for me? 4 people at 13:30 on Sunday, please. Sentence2: I am looking for a place to eat that's expensive and serves Belgian food. Sentence3: I just need the arrival time and price. Sentence4: I have two, the backstreet bistro and the slug and lettuce. Do you have a preference between the two? Sentence5: Yes, what time do I need to be at the station? Sentence6: How about somewhere expensive in the centre? Sentence7: Booking was successful. The table will be reserved for 15 minutes. Reference number is : NSLKEI1G . Sentence8: I want to leave after 10:30 on Monday. Sentence9: The TR8089 meets your criteria. Would you like to book tickets? Sentence10: You're welcome, have a good day. Sentence11: no such restraunts too Sentence12: Thanks! I also need a train from Cambridge to Ely, please. Sentence13: what time will you be departing? Sentence14: I should be asking you what time you need to be at the station. Sentence15: The arrival time for train TR8089 is 12:07, and it will cost only 4.40 pounds. Is there anything else I can help with? Sentence16: I'm sorry, we don't have any Belgian restaurants. Would you like to try a different type? Sentence17: That was everything. Thanks very much! Sentence18: How about a gastropub restaurant? Question: Who has spoken the sentence 1? (A) User (B) System
Answer: (B) System

Sentence1: Yes that would be all. Thank you Sentence2: I actually just need a taxi from the restaurant to the hotel after we eat. We will be done eating by 10:45, so please have the taxi for us by then. Sentence3: Okay, what time do you want to arrive at the restaurant by? Sentence4: Have a lovely day! Sentence5: Ok, I was able to book you at the Ashley Hotel. Your reference number is T0WK7HHS . Is there anything else I can do to help you this evening? Sentence6: Okay great. That's all the information I need for now. Thanks. Sentence7: You're very welcome, have a wonderful day. Sentence8: yes please for 3 people on satruday around lunch time Sentence9: There are 8 hotels with free parking. How about Ashley Hotel? It's a moderate 2 star hotel in the north with free wifi and parking. Sentence10: Yes I do,it is located at 4 Kings Parade City Centre, would you like to make a booking? Sentence11: Sure, the postcode is cb21sj, and the price range is moderate. Is that all you need today? Sentence12: Yeah, could I get the contact number and type of car, as well? Sentence13: Ok, you're taxi has been booked. Is there anything else I can do for you? Sentence14: No but I do need to make sure it is a hotel and not a guesthouse. Sentence15: Sure, is there an area or a price range you are interested in? Sentence16: Sounds great. I need it for one person and three nights starting Saturday. Thank you! Sentence17: Hi, do you have a listing for the copper kettle? It's a restaurant. Sentence18: The contact number is 07703313171 and the car is a white volkswagen. Sentence19: Oh, wait! While I have you, I can go ahead and check on hotels. I need a hotel with free parking. Sentence20: Actually, I don't need to reserve just yet. Can you please just give me the postcode and price range? Sentence21: Do you have a specific time in mind? Sentence22: Yes, I need a taxi to take me to and from the hotel and the restaurant. I need to leave the restaurant by 10:45. What taxi do you have available? Question: Who has spoken the sentence 20? (A) User (B) System

Answer: (A) User