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

Sentence1: Phone is 01223505015 and postcode cb11ln. Would you like me to get you a table? Sentence2: No that's all. Thanks so much! Sentence3: I booked you on TR8399 arriving at 10:07. Booking was successful, the total fee is 17.6 GBP payable at the station . Reference number is : AVBKNMXQ . Sentence4: Thank you very much. Sentence5: I'm looking for an expensive restaurant that serves european food while I'm in Cambridge. Sentence6: Darry's Cookhouse and Wine Shop is located at 40270 King Street at the City Centre. Would you like their phone number? Sentence7: Yes, please, and their postcode as well. Sentence8: You are welcome. Enjoy your stay. Sentence9: No. But I need a train going to Ely. Sentence10: Where are you travelling from and what time? Sentence11: I am departing from cambridge on monday and I need to arrive to Ely by 11:15. Sentence12: You choose one please. I need it for 4 people. Sentence13: Is there anything else I can help you with? Sentence14: I have 3 trains available leaving at 06:07, 08:07, and 10:07. What time would you like to leave? Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User

Sentence1: Limehouse for 1 person, 3 nights and starting on Sunday. Sentence2: Yes, of course. How many people are in your party? Sentence3: What area of town would be your preference? Sentence4: The range does not matter. Just the Indian place you think best. Sentence5: Yes what area are you looking to dine in? Sentence6: You're welcome, glad I could help. Sentence7: Is that a guesthouse? Sentence8: Thank you. I am also looking for a place to stay. It doesn't need internet and should be moderately priced. Sentence9: I would recommend the The Golden Curry. Would you like to make a reservation? Sentence10: That's okay. How about Indian? Sentence11: I sure can. What type of restaurant are you looking for? Sentence12: Thank you for all your help. Have a great day. Sentence13: I'm looking for Cuban food. Sentence14: It is a guesthouse. Would you still like me to book it? Sentence15: I don't have a preference. What would you recommend? Sentence16: There are no Cuban restaurants unfortunately. Sentence17: Yes, let's make it for 1 person at 19:45 on sunday. Sentence18: Yes, I love guesthouses when I travel alone. Can you book it for three nights please, starting on Sunday. Sentence19: I'd recommend the Limehouse, it's in the north and has 4 stars. Would you like me to book a reservation? Sentence20: Your reservation is successful, they'll hold the table for you for 15 minutes. Reference number is 6CVKLM3F . What else can I help you with? Sentence21: In the Centre as well please. Sentence22: I have 9 restaurants available. What price range would you prefer? Sentence23: Would you be so kind as to help me find a place to dine later? Sentence24: Booking was successful. Reference number is : 2VEHCBYQ . Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System

Sentence1: Yes! There are quite a few. Do you have a preference for type of food? Sentence2: You are most welcome! Sentence3: Yes, can you provide me the address of Hakka? Sentence4: I don't need a reservation right now, but I am looking for a train. I need to leave Wednesday after 15:45. Sentence5: That's all actually. Thank you for the assistance. Sentence6: There are two, one is called Hakka and another is the Hotpot. Would you like a reservation at one of these restaurants? Sentence7: I am looking to leave on wednesday after 15:45 and should depart from cambridge and arrive at london kings cross. Sentence8: Is there a good restaurant on the north end of town? Sentence9: Is there anything else I can help you with today? Sentence10: The soonest after 15:45 is TR3843, departing Cambridge at 17:00 and arriving in London at Kings Cross at 17:51. Will that meet your needs? Sentence11: Yes that would be fine. thank you Sentence12: I have many options for you. Where are you going and from where are you departing? Sentence13: An expensive chinese restaurant please located in the north Sentence14: It's Milton Road Chesterton, postcode cb41jy. Phone number is 01223568988. If you'll tell me how many people and when you'll be dining, I'll be happy to book it for you. Question: Who has spoken the sentence 7? (A) User (B) System

Answer: (B) System