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

[EX Q]: Sentence1: How about the Alexander bed and breakfast in the centre? It is a cheap 4 star guesthouse with free internet and wifi. Sentence2: That sounds like it might work. Could you check availability for two people this weekend? Sentence3: Does this place include free parking? Sentence4: I am unsure at this time. Sentence5: I am glad to help. Have a nice day. Bye. Sentence6: I live in the centre of town and want to see if I can find a reasonable room for my parents to stay while they are visiting. Sentence7: Okay, would you like some more information about that hotel? Sentence8: You have been very helpful. I have everything I need, thanks. Bye Sentence9: The address is 56 saint barnabas road. Sentence10: What day are they arriving, and how many nights are they staying? Sentence11: The alexander bed and breakfast is a cheap, 4 star guesthouse in the centre area, It has wifi and parking. Does this fit your needs? Sentence12: Can you tell me what the address is? Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Okay great, have a good day. Sentence2: Yes, quite a few! There's Broughton House Gallery, the Whipple Museum of the History of Science, and more. Would you like to know more about them, or the others? Sentence3: Yes, can you book it for 3 people and get me the reference number? Sentence4: Primavera is at 10 King s parade CB2 1st, the phone number is 01233357708. What day would you like to board the train? Sentence5: Could I get the address, phone numbers, and postcodes of them please? I'm also looking for a train from cambridge to broxbourne. Sentence6: Can you find me a multiple sports attraction in the centre? Sentence7: No, actually. I am all finished. Thanks for the help. Goodbye. Sentence8: Train TR9580 departs from Cambridge at 10:01 on Sunday and arrives at Broxbourne at 11:01. Would that work for you? Sentence9: Sorry there's no multiple sports in the centre. Would you like to try a different area? Sentence10: There are 11 museums in the area. They are all free. There are several art museums, an archaelogy museum, and a science museum. Sentence11: Yes I would love some information. Sentence12: Are there any museums in the centre? Sentence13: Sunday, and it should arrive by 12:00. Sentence14: Booking was successful, the total fee is 42.96 GBP payable at the station . Reference number is : IRD8RUWO . Do you need help with anything else? Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Wonderful. Thanks for help. Sentence2: I also need a taxi to pick me up from Milton Country park by 20:30. Sentence3: Would you like me to go ahead with booking at city stop restaurant? Sentence4: European sounds good! Sentence5: I have booked a taxi for you for 20:30. Look for a yellow bmw. Contact number is 07961088935 Sentence6: I have five restaurants matching your request. Would you like Asian, Chinese, European, or French food? Sentence7: Okay, thank you. What is the entrance fee? Sentence8: Not right now. Can you give me their address and postcode? Sentence9: My destination is City Stop Restaurant. Sentence10: there is milton country park in the north, it's in the address milton country park, milton. Sentence11: If you need anything else, we're always here and ready to help! Sentence12: Sure, city stop restaurant, Cambridge City Football Club Milton Road Chesterton cb41uy, phone 01223363270. Would you like to book a table? Sentence13: No thank you. Are there any parks in town? Sentence14: Entrance is free at Milton Country Park. Sentence15: I can book a taxi for you but will need to know your destination in order to book it for you. Sentence16: I am looking to find an expensive restaurant in the north area of town. Question: Who has spoken the sentence 12? (A) User (B) System
[EX A]:
Answer: (A) User