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

Sentence1: Cambridge artworks is wonderful! They are located at 5 greens road cb13ef. There phone number is 01223902168. Sentence2: Yes, there are 4 museums. Three are free and one has a 5 pound entrance fee. Are you looking for a gallery? Sentence3: What do you recommend? Sentence4: Can you help me find a place to go in the east? Sentence5: Thank you. That's all I needed. Sentence6: I'm also looking for a place to eat. I don't mind where, but I want an expensive chinese place. Sentence7: Ok. I booked a taxi for you. It is a blue audi and the contact number is 07155610417. Sentence8: You're welcome, goodbye! Sentence9: A recommendation would be fine. Can I get the area they're in and post code? Sentence10: I'd also like to book a taxi between the two places. I'd like to leave the restaurant by 2:30 Sentence11: There are 9 options that fit your criteria. Would you like a recommendation or would you like to narrow it down further? Sentence12: We have 5 very nice attractions in the east, do you have an idea of type of activity that would best match your needs? Sentence13: I recommend yu garden. It is located in the east. The address is 529 Newmarket Road Fen Ditton. Postcode cb58pa. Sentence14: Is there a museum I could go to on that side of town? If so, please provide phone number, address, and postcode. Question: Who has spoken the sentence 3? (A) User (B) System
Answer: (B) System

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: Can I have a reference number for the restaurant? Sentence2: Can you email or fax me the information for my personal reference? Thank you for your assistance. Sentence3: for when and how many in your party please? Sentence4: Nevermind, I wrote the info down. I'll text it to everyone else, it'll be faster that way. Thanks for your help! Sentence5: The post code for Williams Art and Antiques is cb12lj. Sentence6: Do you have a price range in mind? Sentence7: Great I also need to get a taxi that can get me to the restaurant by 11:15 Sentence8: I have 4 expensive restaurants in the centre, cafe uno is a good one. Would you like me to make reservations? Sentence9: The reference number for the restaurant is MXMOHDJ7 . Sentence10: What is their postcode? Sentence11: For 7 people at 11:15 on Saturday, please. Sentence12: I know the place! It's located in the centre and it's free of charge. Sentence13: I also need a taxi. Sentence14: Booking completed! Booked car type : red volvo Contact number : 07479126194 Sentence15: Your restaurant Reference number is : MXMOHDJ7 . And your taxi contact number is 07479126194. Do you have a number I should forward this information to? Sentence16: look out for a red volvo and the contact is 07479126194 Sentence17: Glad I could help. Have a nice day! Sentence18: I would like an expensive restaurant. Sentence19: I am looking for an attraction called Williams Art and Antiques. Sentence20: Ok, that booking was successful, and the table will be reserved for 15 minutes. Sentence21: Caffe Uno will be fine. Yes, I'll need to reserve a table on Saturday. It will be at 11:15 for 7 people. Sentence22: Thank you, I am also looking for an Italian restaurant in the centre. Question: Who has spoken the sentence 19? (A) User (B) System
Answer: (B) System