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

Sentence1: Could you check the spelling(city centre north b and b) and try to search again? Sentence2: The TR2512 takes 51 minutes. Anything else you need? Sentence3: I will be traveling on Thursday. Sentence4: It is a cheap, 0 star guesthouse located at 328a histon road on the north side. It has free internet and parking. Phone number and postcode are 01223312843 and cb43ht. Sentence5: Yes I am looking for information on a hotel called City Center North B and B. Sentence6: Sure! give me the following information: Day of visit, number of people and number of days that you will be staying. Sentence7: I cannot find that hotel. Any other hotels you would like to find? Sentence8: You're all set. Your reference number is HOSVDEGA . Can I help you with anything else today? Sentence9: Do you have a time preference? Sentence10: Well that will not work. Sentence11: I need to arrive by 14:15. Sentence12: there are many trains but you need to tell us which day you want to travel Sentence13: I am also looking for a train into Cambridge from London Kings Cross. Sentence14: Please book for 2 people starting on thursday for 4 nights. Sentence15: enjoy your stay in Cambridge! Sentence16: The TR2512 will fit your needs. Would you like to book this train? Sentence17: The first train leaves at 5:17. Sentence18: Thank you. Are you able to book that for me? Sentence19: Not at this time. What is the travel time for that train, please? Sentence20: no that will be all thanks Question: Who has spoken the sentence 19? (A) User (B) System
Answer: (B) System

Sentence1: Not really but I would like to make a reservation for 7 people at 16:45 on a Friday. I will need the reference number as well. Sentence2: I also need to get a taxi to go from the hotel to the restaurant. I need it to arrive at 16:45. I'd like the contact number and the car type. Sentence3: The car type is a White Volkswagen and the contact info is 07869317817. They will pick you up in time to have you at the restaurant by 16:45. Sentence4: Hi! I'm planning my trip to Cambridge and I was wondering if you had information on any Mediterranean restaurants located in the centre of Cambridge? Sentence5: I was able to book the table for you the reference number is HH5J45Z5 . There are many guesthouses to chose from, what area do you want to stay in? Sentence6: Thre are 3 such places. Do you have a price range? Sentence7: Thank you so much, thats all I need Sentence8: I would like to recommend the gardenia is that okay to book? Sentence9: I don't seem to have a preference but I wiukd like a moderately priced place with free parking. Sentence10: Could I have the postcode and how many stars of the hotel? Sentence11: You're very welcome! Have a great stay! Bye! Sentence12: Can I reccommend acorn guest house in the north,it has free parking and moderately priced? Sentence13: Yes. That sounds good. Do you have any moderate priced guesthouses available? Sentence14: The postcode of Acorn Guest House is cb41da. Question: Who has spoken the sentence 8? (A) User (B) System
Answer: (A) User

Sentence1: I can definitely help with that. What day would you like to travel? And what is your desired destination? Sentence2: Yes, would you be able to help me find a train leaving from Cambridge? Sentence3: I'm looking to stay in a guesthouse while I'm there. I'd like a place that has free parking. Sentence4: The first train to leave after 14:30 is TR6982 and leaves at 15:11 Sentence5: OK, could you book me 7 tickets for the TR6982? Sentence6: There are a number of guesthouses. Do you have a price range and an area that you prefer? Sentence7: Not particularly. I just need one for 5 nights starting Monday. Whichever you recommend. Sentence8: I want to travel on Saturday from Cambridge to Kings Lynn. Sentence9: You're booked at the Acorn Guesthouse for 3 nights, 7 people, starting on Monday. Your reference number is WU51A5WI . Can I help with anything else today? Sentence10: I do not need anymore help. Thank you for your help. Sentence11: Is there a specific area of town you would like to stay in? Sentence12: I am very sorry, but I was unable to book a guesthouse, would you be able to check in at a later day, or could you stay for a shorter period? Sentence13: No. What is available? Sentence14: Booking was successful, the total fee is 54.88 GBP payable at the station. Is there anything else I can help you with? Sentence15: I would like to leave after 14:30. Could you find me a train for that time? Sentence16: Not at the moment. Can you recommend any moderately priced guesthouses to accommodate 7 people? Sentence17: There are 19 different trains on Saturday from Cambridge to Kings Lynn. What time would you like to arrive by? Sentence18: Can you book it for 3 nights? Sentence19: Thank you for allowing me to assist you. Enjoy your stay! Let us know if there's anything we can assist you with in the future! Sentence20: I have 21 places that fit what you want. Do you have a price preference? Question: Who has spoken the sentence 6? (A) User (B) System

Answer: (A) User