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

[Q]: Sentence1: You're welcome. Is there anything else I can help you with? Sentence2: I am looking for a 3 star hotel to stay in. Sentence3: Thank you. What's the travel time? Sentence4: No, that is all I need. Thanks! Sentence5: I reserved Wednesday night at the University Arms Hotel for 5 people. Your reference number is GM90EY8A . Is there anything else? Sentence6: travel time is 47 minutes Sentence7: Lets try just booking it for one night. Sentence8: The hotel should be in the expensive price range. Sentence9: Okay, I've got two that fit the bill. One in the centre of town and one in the south. Do you have a preference? Sentence10: I am very sorry, but I was unable to book a reservation for you. Would you be willing to book a later day or would you be willing to have a shorter stay? Sentence11: I do, yes. I would like to stay in the center of town. I need it to fit five people, for 3 nights, starting Wednesday afternoon. Sentence12: Great! I will need 5 tickets. Sentence13: same day as my hotel booking. Sentence14: You are booked for Train Tr5556, your reference number is JA6WAOJC . Sentence15: I do have a four star hotel in the centre of town, but it is also unable to accommodate your guests for 3 days. Can you adjust your length of stay? Sentence16: Sure I will be able to book you a train, on what particular day will you want to travel? Sentence17: Can we book the other expensive 3 star hotel for one night starting on wednesday? Sentence18: I apologize. One night is not working either. There are guesthouses. Sentence19: How many tickets do you need? Sentence20: There are 6, 3 start hotels in Cambridge. Do you have a preference for the part of town it is located in? Sentence21: No trouble at all, I hope you have a wonderful stay! Sentence22: What about the 4 star hotels? Sentence23: Yes, I also need a train leaving after 18:30 from kings lynn to cambridge. Sentence24: Thank you very much. Question: Who has spoken the sentence 4? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: Thank you for using our system today! Sentence2: I am coming to cambridge and heard about a bed and breakfast called finches. Sentence3: Yes, I would like to arrive before 5:00 PM. Sentence4: It is a lovely guesthouse on the west end boasting cheap prices and a 4 star rating! Would you like their address or phone number perhaps? Sentence5: I actually would like to book the hotel for 7 people starting on Tuesday for 3 nights. Sentence6: I'll be departing from cambridge and going to norwich. Sentence7: I apologize, I actually need to leave after 16:30 Sentence8: No problem, but I'm afraid there are no trains leaving after 16:30 and arriving by 17:00. Might I suggest TR7047, which leaves Cambridge at 16:36 and arrives in Norwich by 17:55? Sentence9: Is there a time you would like to arrive before? Sentence10: Can you also help me find a train on Fridya? Sentence11: Train TR7747 leaves at 15:36 and arrives in Norwich at 16:55. Would you like me to book you tickets? Sentence12: Thank you, no that will be all. Sentence13: OK, the booking for successful. The total is 17.6 GBP and the reference number is MIMOPEN1 . Is there anything else I can do for you? Sentence14: Yes, that sounds great. Please book that for me. Sentence15: I was able to book your party of 7 at Finches bed and breakfast for 3 nights. Your reference number is 4R76GWVJ . Can I help you with anything more today? Sentence16: Of course. There are many available Friday. Where will you be traveling to and from? Question: Who has spoken the sentence 7? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: i want to book a taxi. The taxi should go to riverside brasserie and should arrive by 19:30. Sentence2: Thank you so much goodbye. Sentence3: Booked a blue honda. Your contact number is 07886967603. Sentence4: I'll be leaving from Cambridge Arts Theatre. Sentence5: From where will you be departing? Sentence6: Have a wonderful day! Question: Who has spoken the sentence 5? (A) User (B) System
[A]:
Answer: (B) System