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

Sentence1: Booking completed! Booked car type : red ford Contact number : 07059574947 Sentence2: Thats everything I needed thanks for the help! Sentence3: I'm afraid there aren't any theatres on the west side. most of our theatres are in the city centre. is there something else I can look up for you? Sentence4: Yes, I love museums. Sentence5: Yes I also need a taxi to arrive there by 18:00 from the theater. Sentence6: I'll be here any time. Sentence7: Can you find a restaurant called Rajmahal. Sentence8: There are several museums in the area. Would that interest you? Sentence9: Great, thanks. I'm also interested in attending a theatre on the west side. Sentence10: Ok are there any attractions in the west you recommend? I need a phone number for whatever you chose. Sentence11: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 1XCDMW6O . Sentence12: In the west if there are any there? Sentence13: Sure. It's an Indian place in the east area of town. What would you like to know about it? Sentence14: What entertainment choices are in the west? Sentence15: sorry, i couldn't find anything in the west. Sentence16: That's all I need to know. Can you reserve me a table for 3 Saturday at 18:00? Sentence17: How about the Kettle's Yard, there phone # is 01223748100 and they are on Castle Street. Admission is free too. Does this work? Sentence18: What side of town would you like to be on? Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System

Sentence1: No, but I would like to find a cheap priced south african restaurant. Sentence2: I'm sorry, but we don't have and South African restaurants in the area. Is there a different type of food I can help you find? Sentence3: I would say let's look for an attraction first. Can you recommend something to do in the south part of town? Sentence4: I will go with whatever you recommend, I just need the attraction type and postcode. Sentence5: Hi, I am looking forward to trying some of your local restaurants. I do need help with some other places to go in town while I am there though. Sentence6: There are several nice parks in the area as well as theaters and museums. Sentence7: The byard art museum postal code is cb21sj. Can i help you get transportation to and from the museum? Sentence8: Try Portuguese then. Sentence9: Thanks so much for putting up with me! You've been great! Sentence10: 3 people will be dining. Please give me a reference number once you finish the reservation Sentence11: I would rather be in the south area. Sentence12: What is your food type preference? Sentence13: There are two results. Both are cheap. Do you prefer the south or centre? Sentence14: I have finished booking it for Thursday at 12:15 for 3 people at Nando, your reference number is TDQZGM38 . Do you need anything else? Sentence15: Can you book a table for me there on Thursday at 12:15? Sentence16: The only option is nandos. Sentence17: You are welcome enjoy Sentence18: How many people are in your party? Question: Who has spoken the sentence 15? (A) User (B) System
Answer: (B) System

Sentence1: I need a 4 star place that has free wifi. Sentence2: Any particular area you would like to stay? Sentence3: Would you like to try allenbell? Sentence4: No thanks. Go ahead and book the train for 4 people and please provide the reference number. Sentence5: I don't really have a preference. Sentence6: i dont mind either. Sentence7: Thank you that is all I needed. Sentence8: Leaving Cambridge this coming Sunday. Sentence9: I'm sorry, we don't have any trains arriving by 17:15. The earliest train will arrive at london kings cross at 19:51. Do you need anything else? Sentence10: I have 21 trains that match your request. Where will you be departing from? Sentence11: Okay! What price range would you like? Sentence12: We have seven places, any preference on price or rating? Sentence13: You're welcome. Have a great day! Sentence14: Ok. We've narrowed to 6 options. Do you want parking? Sentence15: I need to find a train going to londons kings cross that would arrive by 17:15 Sentence16: Thank you. I also need to find a place to stay. Sentence17: I have made those reservations and the reference number is I4K0OYPF . Sentence18: In the East part of town, please. I need free WiFi. Sentence19: No parking is not a concern of mine. Sentence20: Your booking was successful, the total fee is 75.52 GBP payable at the station . Your reference number is : UMS71SR7 . Your train will leave at 19:00. Sentence21: Okay! Would you like to stay in a hotel, or in a guesthouse? Sentence22: Yes, please book me for 4 people, for 5 night starting on Tuesday. Question: Who has spoken the sentence 15? (A) User (B) System
Answer: (B) System