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

Example Input: Sentence1: Reference number is 29IN9CT3 for the acorn guesthouse. Sentence2: Sounds great if it is portuguese. I'll take a reservation for 7 people at 20:00 for the same day. Sentence3: Okay, how about the Acorn Guest House in the north? Sentence4: There is. How does Nandos City Centre sound? Sentence5: Okay, it was my pleasure to assist you! Bye! Sentence6: No, that's all I needed today. Thank you for your help! Goodbye! Sentence7: do you have one the is portuguese food ? Sentence8: I'm looking for information on 4-star rated guesthouses in Cambridge Sentence9: You're all set. Your reference number is 6R5W1RRE and your table will be reserved for 15 minutes. Anything else? Sentence10: I suggest the dojo noodle bar, an asian oriental restaurant, would you like to make a reservation? Sentence11: Sure. Can we spend 5 nights starting on Sunday? I am going to need room for 7 people. Sentence12: I have a number of 4 star guesthouses available, would you like to book one in a particular area? Sentence13: I would also like to eat somewhere cheap in the middle of town. Sentence14: Not really. Could you suggest one with free parking? Question: Who has spoken the sentence 7? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Id is TR0625, travel time is 79 minutes and you will arrive by 22:55. Anything else? Sentence2: Actually, could you help find a train as well? To Norwich? Sentence3: I found a train from cambridge to norwich at 05:36 on Friday, will that work? Sentence4: Sunday would be good. Sentence5: No, you've answered all of my questions. Thanks so much for your time. Bye. Sentence6: The Acorn Guesthouse is a 4 star hotel located in the north side of town. It includes free internet and parking. Would you like me to book it for you? Sentence7: I need to leave after 21:30, is there anything closer to that time? Sentence8: Thank you, and thanks again for using our free service. Sentence9: I am trying to find the Acorn Guest House. Sentence10: No, just leave after 21:30. Will you give me the travel time, arrival time and the Train ID? Sentence11: No, thanks. I will go ahead and book it myself. I think I have all the information I need. Thank you. Sentence12: Is there a time you need to arrive by? Sentence13: Yes there are 14 trains. Which day would you like to depart? Sentence14: Thank you for using our service, have a nice day. Question: Who has spoken the sentence 11? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: ok thanks and have a great day Sentence2: Oh, ok. I really don't want to stay at a guesthouse though. Can you recommend a hotel instead? Sentence3: alexander bed and breakfast is a guest house in the centre area. Would you like to book a room? Sentence4: Keep the snarky comments to yourself. Sentence5: What is the train schedule from birmingham new street like? I need to arrive at 13:45. Sentence6: It doesn't matter. What do you recommend? Sentence7: I need the travel day to be Sunday. I'll be going to Cambridge and arrive by 13:45. I'll be leaving from Birmingham New street. Sentence8: What is the travel time on that train? Sentence9: I am planning a vacation and really could use some help finding a good place to stay in town. I've never been to Cambridge before. Sentence10: Booking was successful. Reference number is : 36N9VCAD . Is there anything else I can help with? Sentence11: which side of town do you prefer and what is the price range? Sentence12: Yes, thanks very much! Have a great day! Sentence13: You too! Thanks so much for all the help. Please end the convo and read the directions next time. thanks Sentence14: Train TR7468 will arrive at 13:23. Will this work for you? Sentence15: You are quite welcome, thank you for using our services. Have we met all of your needs today? Sentence16: Where would you like the train to arrive, and what time will you be leaving? Sentence17: The Huntingdon Marriott hotel is a very nice place. Sentence18: It is 163 minutes on that train. Sentence19: Sounds good. Can you get me a room for 2 for 5 nights starting Sunday? Sentence20: Excellent. Thanks for all the help! Question: Who has spoken the sentence 15? (A) User (B) System
Example Output:
Answer: (B) System