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

[Q]: Sentence1: I have a train leaving at 18:11. Will that do? Sentence2: You're welcome. Have a nice day. Sentence3: You train has been booked. Total fee is 19.6 GBP which is payable at the station. Your reference number is 5PVB9XYJ . Sentence4: Arrival time does not matter, just leave after 17:30 Sentence5: Milton Country Park is in the north and has free admission. Sentence6: Is there a time you would liek to arrive by? Sentence7: Hello, I'm looking for a place to go in the north. Could you suggest some places? Sentence8: That would work. Can you book that please? Sentence9: Perfect! That is all I needed. Thank you for the help. Goodbye! Sentence10: I need to book for two people and I need the reference number. Sentence11: Can I get the phone number please? Sentence12: Absolutely. Their phone number is 01223420060. Is there anything else I can assist you with? Sentence13: I'm leaving Kings Lynn on Wednesday. Sentence14: Yea I also need a train that goes to cambridge and should leave after 17:30. Sentence15: How many people would you like to book? Sentence16: What day will you be traveling, and where would you like to depart from? Question: Who has spoken the sentence 2? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: The postcode is CB58BS. Can I help you find anything else? Sentence2: Can you tell me what their star rating is? Sentence3: I need something in the south and free parking. Sentence4: I will be in the centre of cambridge. I am looking for any type of attraction involving architecture. Sentence5: You're very welcome, I'm glad that I could help. I hope that you enjoy your stay! Goodbye. Sentence6: Of course! They are a 3-star establishment. Would you like me to go ahead and book that for you? Sentence7: thats it, thanks! Sentence8: Bridge Guest House was available for 2 nights. Your reference number is ULWMFZAX . What else can I do for you today? Sentence9: I'm sorry. There is no availability. Would you like to try different dates or another hotel? Sentence10: I'd recommend All Saints Church on Jesus Lane. Did you need help with anything else? Sentence11: I would recommend the Bridge Guest House based on your criteria. Would you like me to book you a room? Sentence12: There are 33 places to stay, do you have any requirements? Sentence13: How about just 2 nights instead? Sentence14: yes, 7 people 4 nights starting Wednesday. Sentence15: I need a place to stay. Sentence16: Can you give me the postcode for that? Question: Who has spoken the sentence 4? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: No thank you. I just need the price and travel time please. Sentence2: I'm looking for a hotel with a 4 star rating to stay at and I don't need to have internet. Can you help? Sentence3: They are the Huntingdon Marriott Hotel which is in the west area, and the University Arms Hotel which is in the Centre. Sentence4: The University Arms sounds good. Sentence5: Okay. Your booking was successful and your reference number is HLD21MYL . Sentence6: Thank you for calling today. Please let us know if there is anything else we can do to help. Goodbye. Sentence7: Would you like me to make a reservation for you? Sentence8: I have about 3 options that meet those requirements. All offer free parking and internet. 2 are expensive and 1 is cheap. Do you have a preference? Sentence9: I will be leaving Cambridge and arriving at Ely. Sentence10: What town are you leaving from? What time do you want to depart or arrive, please? Sentence11: We have 10 trains that match your criteria. The TR0996 leaves at 05:50 and gets to Ely by 06:07. Would you like to book you a seat on it? Sentence12: I'm glad I could help you today. Is there anything else you need? Sentence13: Sure! The travel time is 17 minutes and it costs 144.40 pounds. Sentence14: Perfect. You have been so much help! Sentence15: Thank you. That is all I need. Sentence16: Yes please, I also need a train to Cambridge, on Thursday. Sentence17: Tell me about the expensive options. Sentence18: I need it for 8 people, 2 nights from Monday. Question: Who has spoken the sentence 3? (A) User (B) System
[A]:
Answer: (B) System