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

[EX Q]: Sentence1: We have 13 trains meeting your criteria. Do you have any idea how early you want to leave? The first train leaves at 11:32 and then every hour after that Sentence2: Are there any cheap options in the centre of town? Sentence3: We can take care of that too, but let's get your restaurant squared away first - in order to provide an address I'll need to know what type of cuisine? Sentence4: Whichever one you think is best please. Sentence5: to cambridge from broxbourne. i need to leave after 11:15 please Sentence6: Where will you travel too and from? Sentence7: Thank you for using the Cambridge TownInfo centre. Goodbye. Sentence8: excellent. I will need the train booked for 5 as well. Sentence9: It has been booked. You reference number is UCICW103 . Sentence10: I recommend the Dojo Noodle Bar. They're located at 40210 Millers Yard, City Centre. Sentence11: I will be traveling on Sunday. Sentence12: Hi. Can you help me find a restaurant? Sentence13: and what day will you be traveling on? Sentence14: The train should leave broxbourne after 11:15 so the 11:32 is a good choice. There are 5 of us traveling together. Please book. Sentence15: There are a lot of options in Cambridge. Can you please be more specific? Sentence16: Yes, there are chinese, asian oriental, indian, italian, spanish, portuguese, modern europe, and mediterranean available. Sentence17: Great. Thank you so much. Sentence18: Can I have the address? I am also looking for a train that leaves on Sunday to Cambridge. Question: Who has spoken the sentence 16? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Great I also need a taxi to take me between the two places and get me to the restaurant by 20:00 Sentence2: You are most welcome. May I help you with anything else, such as attractions? Sentence3: The University Arms is a 4 star hotel on Regent Street. Would you like me to make a reservation there? Sentence4: Booking was successful. Reference number is : VJQM2DFY . Anything else I can do for you? Sentence5: Is that in the centre area also, and in the expensive price range? That is what I'm looking for. Sentence6: In the centre, please Sentence7: Perfect!. Thank you for your help! Sentence8: Great, can you book for 1 person and 4 nights starting Wednesday. Sentence9: Have a great day! Sentence10: Yes, University Arms Hotel is a 4-star hotel in the expensive price range. Would you like to make a reservation? Sentence11: There are 33 expensive restaurants in the centre of town. Is there a specific type of cuisine you were looking for? Sentence12: Sure, which part of town did you want to eat in? Sentence13: Booking for the taxi complete look for a grey bmw car contact number is 07434690950 to arrive at the restaurant by 20:00 Sentence14: You have been booked at the Bedouin on Wednesday at 20:00 for 1 person. Your reference number is 29KJKZOD . Is there anything else I can help you with? Sentence15: I'm visiting the centre and want to go all out on the experience. Can you help me find an expensive restaurant? Sentence16: I need a place to stay. Sentence17: no, just surprise me. I need a reservation for 1 person at 20:00 on wednesday. Sentence18: No thanks, that's all I needed. Question: Who has spoken the sentence 15? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Can you help me find Arbury Lodge Guesthouse? Thanks. Sentence2: No, I just needed the information on that, I am all set. Sentence3: Can I get their address and postcode please? Sentence4: Sorry for digressing. I am still looking for an expensive Thai restaurant in the center of town. Can you check? Sentence5: Okay, is there anything else I can help you with? Sentence6: Certainly, from what location to what location? Sentence7: Sure, it's located at 82 arbury road. Do you want their phone number? Sentence8: Are you wanting a reservation for Bangkok City for thai? Sentence9: From the restaurant to the hotel. Sentence10: I would like to be picked up by 01:15 if at all possible, thanks. Sentence11: Unfortunately not. Is there another type of music you would like? Sentence12: No thank you. Sentence13: The arbury lodge guesthouse is a 4 star hotel that offers free parking. You can reach their front desk at 01223364319. Can I assist you with anything else? Sentence14: Ok, have a great day! Sentence15: Is there a cheaper bistro? Sentence16: What is the address and post code of the Arbury Lodge Guesthouse? Sentence17: Thank you. I would also like to book a taxi, please. Sentence18: Okay how about Thai food? Sentence19: Their postcode is cb23jx and their address is 24 Green Street City Centre. Sentence20: Yes I need to know whether they have free parking, star of the hotel, and phone number. Sentence21: Thanks for the help. Sentence22: Taxi has been books. It will be a blue tesla, contact number 07585251090. Have you made a decision on type of food you would like? Sentence23: I would rater have some chinese please. Sentence24: bangkok city fits your description. can we book for you? Sentence25: I can take care of that for you. What time would you like to be picked up? Sentence26: Yes, I'm also looking for a restaurant. I'd like it to serve expensive bistro food. Sentence27: The address is 82 arbury road postcode cb42je. Sentence28: There are none that serve that sort. Is there another kind you would like? Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]:
Answer: (B) System