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

[EX Q]: Sentence1: Can you book a table at the Bistro for me? 4 people at 13:30 on Sunday, please. Sentence2: I am looking for a place to eat that's expensive and serves Belgian food. Sentence3: I just need the arrival time and price. Sentence4: I have two, the backstreet bistro and the slug and lettuce. Do you have a preference between the two? Sentence5: Yes, what time do I need to be at the station? Sentence6: How about somewhere expensive in the centre? Sentence7: Booking was successful. The table will be reserved for 15 minutes. Reference number is : NSLKEI1G . Sentence8: I want to leave after 10:30 on Monday. Sentence9: The TR8089 meets your criteria. Would you like to book tickets? Sentence10: You're welcome, have a good day. Sentence11: no such restraunts too Sentence12: Thanks! I also need a train from Cambridge to Ely, please. Sentence13: what time will you be departing? Sentence14: I should be asking you what time you need to be at the station. Sentence15: The arrival time for train TR8089 is 12:07, and it will cost only 4.40 pounds. Is there anything else I can help with? Sentence16: I'm sorry, we don't have any Belgian restaurants. Would you like to try a different type? Sentence17: That was everything. Thanks very much! Sentence18: How about a gastropub restaurant? Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: You're welcome, enjoy your day. Sentence2: How about Downing College? It has free admission and is located on Regent Street/ Sentence3: I'd like to visit a college in the center of town. Could you help me find something interesting? Sentence4: That sounds great! Can I have their phone number and postcode, please? Sentence5: No, that was all I needed to know. Thank you, you've been very helpful. Sentence6: Downing College's phone is 01223334860 and their postcode is cb21dq. Can I help you with anything else today? Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Ok, sounds good. What is the price? Sentence2: I want it to arrive at the restaurant at the booked time. Sentence3: can I please have the contact number for the taxi? Sentence4: Sounds great! I'd like to book a taxi to commute between the two. Sentence5: Can I get the reference number on that? Also I would like to book a restaurant as well in the same price range Sentence6: There aren't any cheap 3 star hotels that have free wifi. Do you have alternative preferences? Sentence7: There are 2,one in centre,and one in the south,which would you like more? Sentence8: Okay I have you booked at the Lensfield Hotel starting Thursday for 5 nights for 2 people. Anything else I can do for you? Sentence9: Alright, when would you like to leave and arrive by? Sentence10: Good night, enjoy your stay at cambridge. Sentence11: I am unable to get a reservation for 2 at 17:45. Should I try a different time? Sentence12: You have a reservation for 2 at Eraina on Thursday at 16:45. Your reference number is 80V5LKSU . Sentence13: Could you try european? I'd like a booking for the same group of people at 17:45 on the same day. Sentence14: The one in the south. Can you book it for me? Sentence15: Yes I suppose, how about 16:45 instead? Sentence16: I need a hotel to stay at that is 3 stars. I would preferably like one that has free wifi at it, and possibly close to the local restaurants. Sentence17: ok i have a yellow ford able to pick you up! Is there anything else I can do for you? Sentence18: I apologize, I do not have any fusion options available in the town centre. Would you like to try another type of food? Sentence19: I would like fusion food and please make sure the restaurant is located in centre. Sentence20: Of course, my apologies for the oversight. Their contact number is 07149496005. Sentence21: How about one in the expensive price range? Sentence22: I need it booked for 2 people for 5 nights starting Thursday. Sentence23: Oh, that won't work. I need it to be cheap. Sentence24: Try gonville hotel located at gonville place. Sentence25: Great. Looks like I have all the information I need. Thanks so much. Bye. Sentence26: Of course, the reference number is 41A4LS9O . We have 57 restaurants in the expensive price range. What type of food are you interested in eating? Sentence27: Gonville hotel is in the expensive price range. Sentence28: I can book the lensfield hotel, how many people will be staying? Question: Who has spoken the sentence 11? (A) User (B) System
[EX A]:
Answer: (B) System