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

Ex Input:
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

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: Unfortunately, I am not seeing any 4 star hotels that are moderately priced in the centre. We could try a cheaper hotel or a guesthouse? Sentence2: Sure do. Their address is fulbourn, postcode cb15dh. Phone number is 01223295264, and entrance is free. It's a museum on the Eastside. Sentence3: Nevermind. Do you have info on gallery at twelve a high street. Sentence4: Thank you very much for your help, have a nice day. Sentence5: Thank you, enjoy your stay in cambridge. Sentence6: Of course. We have so many attractions! What part of town will you be in? Sentence7: I will be visiting Cambridge soon and can't wait to see some of your local attractions. I do need your help with some information. Sentence8: I'm sorry, but there are no cheap hotels in the center of town, either. The only cheap hotel is on the west side. Sentence9: How about in the cheap price range? Sentence10: I have two options. Would you prefer a hotel or a guesthouse? Sentence11: I need a 4 star room in the centre please. Sentence12: A hotel in the moderate price range. Thank you! Question: Who has spoken the sentence 4? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: I am looking for a particular restaurant. Its name is called cafe uno. Sentence2: At what time would you like the reservation? Sentence3: I have booked the table for Sunday, the reference number is 1XGV4VGP . Is there anything else I can help you with today? Sentence4: Caffe Uno? Excellent choice! Would you like to make a reservation? Sentence5: Yes please! There will be 7 of us dining on sunday Sentence6: That's all I needed help with. Thanks a lot! Sentence7: 16:15 seems like a good time. Sentence8: Awesome, thank you for using Cambridge TownInfo centre. Enjoy the restaurant! Question: Who has spoken the sentence 1? (A) User (B) System

Ex Output:

Answer: (B) System