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

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: Yes, can I get a table for 4 on saturday at 15:15? Sentence2: Hi! Can you help me find a particular restaurant? Sentence3: unfortunately they are filled up for that time would you like me to reserve another time or would you like to choose another restaurant. Sentence4: Of course, there are 110 restaurants in town. Would you like me to search by restaurant name? Sentence5: The Varsity Restaurant serves international food in the center of town. Do you want me to book it for you? Sentence6: Excellent. I'll need the reference number. Sentence7: Yes, I am looking for the Varsity Restaurant. Sentence8: Yes, I will book a table for 4 on Saturday at 15:15. Question: Who has spoken the sentence 2? (A) User (B) System
Answer: (A) User

Sentence1: Could you recommend a restaurant that serves indian food is expensive, and in the centre? Sentence2: Sure thing, you have any particular attraction in mind? Sentence3: There are no restaurants that serve indian food? Sentence4: I'd suggest broughton house gallery on 98 king street, cb11ln. Anything else? Sentence5: No that is all. Thank you for your help. Goodbye. Sentence6: I am looking for an expensive place to dine that serves catalan food. Sentence7: Their phone number is 01223314960. Anything else? Sentence8: Yes, could you please give me their phone number? Sentence9: I am sure, would you like me to check for another option? Sentence10: Something in the centre of town. Do you have any suggestions for a museum maybe? Sentence11: Thanks, I'm also looking for a place to go in the same area. Sentence12: I'm sorry, a table isn't available. Perhaps a different day or time slot would work for you? Sentence13: I am sorry there are not Indian restaurants. Can I check for a Chinese restaurant? Sentence14: Sure. What time would you like the reservation for? Sentence15: I do not show any matches for your request, maybe change the type of food? Sentence16: Can you try 13:30 instead? Thanks. Sentence17: Are you sure? I really need an expensive restaurant that serves catalan food in the centre of the city. Can you check again please? Sentence18: I need a table for 2 people on Monday at 14:30. Sentence19: Booking was successful. The table will be reserved for 15 minutes. Reference number is : Z0V0H1YR . Sentence20: Sounds great! Can you set up a reservation? Sentence21: You are very welcome. Thank you for choosing Cambridge TownInfo centre today! Sentence22: I am afraid there is none. Sentence23: What type of restaurants are located in the city centre? Sentence24: I'm so sorry, I was mistaken, there are several expensive Indian restaurants in the centre of town. May I recommend Curry Queen, at 106 Mill Road? Question: Who has spoken the sentence 20? (A) User (B) System

Answer: (A) User