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

Sentence1: Would you like British food? Sentence2: Where are you going or coming from? Sentence3: I will be leaving Cambridge and heading to Ely. Sentence4: The TR8399 leaves from Cambridge on Monday at 09:50. Shall I book that for you? Sentence5: Oh that's great. That would be all, thank you. Sentence6: Sure, that works for me. I need the phone number, postcode, and address for the restaurant. Sentence7: Is there a certain time you need to arrive by? Sentence8: I am looking for a restaurant. The restaurant should be in the centre and should be in the moderate price range. Sentence9: You have 2 seats reserved, and you'll pay 8.8 GBP at the station. Your reference number is 90RLYZKX . Can I help you with anything else? Sentence10: I don't have a food preference. Sentence11: yes, for 2 people. Please give me the reference number. Sentence12: I just need to leave after 08:45 Sentence13: Cotto is a great british restaurant located on 183 East Road City Centre. Their postcode is cb11bg and phone number is 01223302010. Is there anything else you need? Sentence14: Please find me a train that leaves on Monday after 08:45 Sentence15: There are 21 restaurants in the centre. Do you have a certain type of food you'd prefer? Sentence16: Thank you for using our service today. Question: Who has spoken the sentence 13? (A) User (B) System
Answer: (B) System

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
Answer: (A) User

Sentence1: You have been booked for Cityroomz. Your reference number is HAGWQ5KE . Sentence2: Thanks a lot for all your help! Sentence3: ok, anything else i can help you with? Sentence4: i am looking for a particular attraction. Its name is called the place. Sentence5: The hotel should be in the type of hotel and doesn't need to include internet. The hotel doesn't need to have free parking. price doesn't matter. Sentence6: Sure thing, that's 01223324600. Sentence7: Can you get me phone number please, thank you Sentence8: How about the Cityroomz? It's a hotel in the moderate price range. It's located at Sleeperz hotel, station road. Would that work? Can I book it? Sentence9: The Place is a nightclub located at 22 sidney street. Sentence10: I don't need you to book it thank you. Sentence11: Bye! I hope you have a lovely stay! Sentence12: Thanks. I am also looking for a hotel room. Sentence13: Yes what area would you like to stay in and what price range are you considering? Sentence14: Sorry, I am changing my mind. Please book Cityroomz for 4 nights starting on Saturday, for 8 people. Thanks. Sentence15: you are welcome all the time Sentence16: okay goodbye Question: Who has spoken the sentence 3? (A) User (B) System

Answer: (B) System