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

[EX Q]: Sentence1: I am looking for Mediterranean food in the center of the city. Sentence2: I show 3 available. 2 are in the expensive range and 1 is cheap. May I book a table for you? Sentence3: Thanks for calling. You have a great day! Sentence4: I have booked you at the Shiraz Restaurant for 7 people Saturday at 15:45. Your table will be reserved for 15 minutes. Sentence5: I'd like the expensive range and I'd like to book a table for 7 people on Saturday at 15:45. Sentence6: Great. Thanks so much! Sentence7: Thank you so much. That is all I need today. Have a great evening. Sentence8: Sure. Your reference number is MSV3UPS2 . You will likely need it. Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: I'm looking for an expensive restaurant in the center of town. Sentence2: Certainly. When would you like your taxi to depart? Sentence3: Is there any Turkish cuisine? If so I need the postcode and the address. Sentence4: No, that will be all, thank you! Sentence5: I need to arrive at Cambridge Contemporary Art by 19:15 please. Sentence6: Okay, have a nice day. Sentence7: I don't really care, what do you recommend? I will need the postcode and entrance fee please. Sentence8: I am also looking for museums in the area. Sentence9: How about Cambridge Contemporary Art? The entrance is free and the postcode is cb21su. Enjoy! Sentence10: There are many museums listed in the centre area, what kind of museum are you interested in? Sentence11: No problem. Your taxi has been reserved. Your driver's contact number is 07035811281 and will be driving a grey toyota. Is there anything else you need today? Sentence12: Thank you. I would also like a taxi to commute between the two places. Sentence13: There are many expensive restaurants in the centre of town, is there a specific type of food you would like? Sentence14: The Meze Bar restaurant matches your tastes. It is located at 196 Mill Road City Centre. The postcode is cb13nf. Question: Who has spoken the sentence 10? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Ok I will book it for you Sentence2: Yes please. Two nights from Tuesday for two people. Sentence3: The TR3677 arrives at 17:58. Would you like to book it? Sentence4: I need a room for the same group of people for 1 night on the same day. And I need the reference number then too please Sentence5: I got your room booked at the Carolina Bed and Breakfast. Your reference is FYLDIZUF . Is there anything else I can help you with today? Sentence6: Okay, I think I can help you. Where will be coming from? Sentence7: Can you help me find a train going to cambridge that arrives by 18:30? Sentence8: Thanks so much. Can you also help me look for the Carolina Bed and Breakfast? Sentence9: Carolina Bed and Breakfast is in the East, it is a guesthouse in the moderate price range. Would you like to book a room? Sentence10: I will be departing kings lynn. Sentence11: Yes for 2 people on a Tuesday please. And I would like the reference number. Sentence12: I'm going with TR5793 since you are travelling on Tuesday arriving at the same time. The total fee is 19.6 GBP payable at the station . Reference number is : 4NLGW7WM . Question: Who has spoken the sentence 8? (A) User (B) System
[EX A]:
Answer: (A) User