You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
--------
Question: 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: Answer: (B) System

Question: Sentence1: Great, have a wonderful day and enjoy your taxi ride, thank you! Sentence2: What time would you like to arrive? Sentence3: No, that is all I need today. Thanks! Sentence4: i want to book a taxi. The taxi should depart from la Margarita and should go to riverboat Georgina. Sentence5: I have a white tesla booked. The contact number is 07032807056. Anything else today? Sentence6: I would like to arrive by 17:15. Question: Who has spoken the sentence 2? (A) User (B) System

Answer: Answer: (A) User

Question: Sentence1: There are no restaurants available matching your criteria. Would you like to try a different area, price range, or food type? Sentence2: The phone number for gourmet burger kitchen is 01223 312598. Sentence3: Thank you for using the Cambridge restaurant system. Goodbye. Sentence4: What price range are you looking for? Sentence5: Is there any place here in the centre that serves corsica food? Sentence6: Can I get the phone number? Sentence7: Any price range will do. Sentence8: Yes. The gourmet burger kitchen serves north american food and is located in the centre part of the city. Would you like their location? Sentence9: Are there any restaurants in the centre that serves North American type of food? Sentence10: Thank you. Good bye. Question: Who has spoken the sentence 9? (A) User (B) System

Answer:
Answer: (B) System