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

Example Input: Sentence1: Sure. What area would you like to stay in? Sentence2: yes postcode is cb39lh Sentence3: I'd like to stay on the westside, at a place with free parking and WiFi. Sentence4: Can you help me find a moderately priced place to stay? Sentence5: There is the Hobsons House. It is nice and is a 3 star guesthouse. Sentence6: Could you give me the postcode. Question: Who has spoken the sentence 4? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: Graffiti sounds good. I actually need that reservation for 5 people at 20:00 on Wednesday. Can I have the reference number for that? Sentence2: There are two trains that would work. One arrives at 07:07 and the other arrives at 01:07. Which one would you prefer? Sentence3: I would recommend Graffiti. It is a bit expensive, so if you want something moderately price there is also Saint Johns Chop House. Sentence4: Great, thanks! That's all I needed right now! Sentence5: Alright, I've booked a train for your group, the reference number is AOIMGBHK, and there will be an 83 GBP fee at the station. Sentence6: What time would you like these reservations? Sentence7: I need to find a British restaurant in West Cambridge. Sentence8: i can definitely do that, how many tickets would you like? Sentence9: No, can you recommend a favorite? Sentence10: I would also like a train departing from london liverpool street and arriving in Cambridge at 09:00 on the same day. Sentence11: Please book 2 tables for 8 people on friday also i need train tickets for 8 people. Sentence12: There are multiple options for you. To narrow them down what price range do you have in mind? Sentence13: Can you book the train that arrives at 07:07 that one would work great. I need the reference number as well. Sentence14: it's for the same group of people Sentence15: Booking was successful. The table will be reserved for 15 minutes. Reference number is : YYPPDY56 . anything else i could help you with? Sentence16: You're welcome. Have a great day. Question: Who has spoken the sentence 11? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Great! Thank you for your help. Sentence2: There are several trains departing on Friday every :39 of the hour from 9:39 to 23:39. Would you like me to book one of these for you? Sentence3: What day and how many people are you looking to book for? Sentence4: I'll go with the 9:39. Sentence5: Ok, I have three tickets booked on the 9:39. The reference number is QOL9GX6F . Does Pizza Hut Fen Ditton sound good? It's the only Italian restaurant in east. Sentence6: Please modify the booking for three people please. Sentence7: Ok, I have booked dinner for three on Saturday at 16:30 at Pizza Hut Fen Ditton. Your reference number is MLMBLJEG . Enjoy your meal! Sentence8: Thank you for choosing Cambridge TownInfo centre. Have a nice trip! Sentence9: Wonderful, your train has been booked! Sentence10: What trains leave London Liverpool Street and go to Cambridge? Sentence11: Yes I think that would be good. Is that available at 4:30 PM? Sentence12: There are several trains that depart from London Liverpool Street on Friday. Is there a particular time you wish to leave by? Sentence13: Sure. Just a moment. Sentence14: I think I forgot to add that I will need the booking for 3 people please. Will you modify the booking for me? Sentence15: I am looking for 3 people, at 16:30 on saturday. Sentence16: I need a reference number for the train. Then I need to find a moderate Italian restaurant in the east for 3 people at 16:30 on Saturday, and a reference number. Sentence17: Thank you that is all the info I need. Sentence18: Yes, sometime after 09:15. Question: Who has spoken the sentence 6? (A) User (B) System
Example Output:
Answer: (A) User