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

Sentence1: Great. You should expect a blue volkswagen . You can contact them on 07261965496 Sentence2: Where will you be headed? Sentence3: Thank you! That's all I need for now. Sentence4: Great, I hope you have a great visit! Sentence5: I'll be headed to the Cherry Hinton, of course. Sentence6: THanks so much you have been a huge help. Sentence7: Can you help me find a moderately priced restaurant in the center of town? Sentence8: How about asian oriental that is in the moderate price range located in the centre of town? Sentence9: cool I would need the address, postcode, and phone number. Sentence10: There is no information on the entrance fee since there are a variety of facilities. Anything else I can help with? Sentence11: How about the cherry hinton village centre? Sentence12: Sure, I can help with that. Is there a certain cuisine you are looking for? Sentence13: That sounds perfect! Do you know the entrance fee? Sentence14: Have a nice day. Good bye. Sentence15: Okay, great. I'm also looking for an attraction in the same area. I'd like it to be multiple sports. Sentence16: No preference really. whatever you recommend Sentence17: Okay, the yippee noodle bar is at 40428 King Street City Centre postal code cb11lh and it's number is 01223518111. Is there anything else I can help you with? Sentence18: I need to book a taxi to commute between the 2 places. I want to leave the restaurant by 14:30. Question: Who has spoken the sentence 15? (A) User (B) System
Answer: (B) System

Sentence1: I hear its a pretty cool place. Can I get their postcode please? Sentence2: Yeah, I need a place to stay on the south side. 4 stars if possible. Sentence3: Postal is cb17sr, they do include internet and they can be reached at 01223240089, can I help with anything else? Sentence4: i am looking for a particular attraction. Its name is called soul tree nightclub. Sentence5: You're welcome! Have a great day! Sentence6: Can you book me a stay at The Aylesbray Lodge? Sentence7: The Soul Tree Nightclub is located in the area of centre. It has an entrance fee of 4 pounds. The phone number is 01223477900. Anything else? Sentence8: The postcode is cb23qf. Do you need anything else? Sentence9: You have a great day as well! Sentence10: Thanks for using our services. Sentence11: Sure! How many are staying, how many days, and what day do you want the stay to start? Sentence12: That was everything, thanks a lot! Sentence13: No I just need the postcode, phone # and if they have internet Sentence14: We have two guesthouses that are 4 stars in the south end, The Aylesbray Lodge Guest House is moderately priced, and Rosa's Bed and Breakfast is in the cheap range. Question: Who has spoken the sentence 12? (A) User (B) System
Answer: (A) User

Sentence1: No that was all I needed. Thank you so much. Sentence2: Thanks so much! Sentence3: I would like gastropub food. Sentence4: Sure, that works. What is the area, postcode and phone number for the Cow Pizza Kitchen and Bar? Sentence5: what about royal standard? it's lovely Sentence6: No, but can you tell me the address for the best one to visit? Sentence7: cambridge has a college that is in the centre. I would like to know more Sentence8: Sure! What kind of food do you want? Sentence9: Is that in the moderate price range? Sentence10: It is in the expensive range. However, the cow pizza kitchen and bar is in the moderate range. Sentence11: Thanks. Could you also help me find a place to eat? Sentence12: You're welcome, have a great day! Sentence13: Is there anything else I can help you with today? Sentence14: 01223308871 is the number and the postcoade and address is cb23qf Corn Exchange Street Sentence15: There are 13 colleges in the centre area of Cambridge. Did you have a particular one in mind? Sentence16: Sure, Christ's College is on saint andrew's street and the postcode is cb23bu. Question: Who has spoken the sentence 4? (A) User (B) System
Answer: (A) User