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

Example Input: Sentence1: Have a good day! Sentence2: No thank you, that is all. Sentence3: I am looking for a train to London Kings Cross that departs after 08:15. Sentence4: The TR2000 leaves cambridge going to london kings cross on friday at 09:00. It arrives in london kings cross at 09:51. How does that sound? Sentence5: Yes. What do you have available? Sentence6: Are you departing from cambridge station? Sentence7: I'll be travelling on a Wednesday. Sentence8: That's great. Please book me two tickets. Sentence9: The booking was successful and the fee is 47.2 GBP payable at the station. Reference number is E2N0JHSY . May I assist you with anything else today. Sentence10: What day would you like to travel? Question: Who has spoken the sentence 3? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: How many tickets will you be needing today? Sentence2: That is all, thanks. Sentence3: I booked 4 tickets on train TR4187, your reference number is LXZWA3Q8 . A total of 66.4 GBP is payable at the station, can I help you with anything else? Sentence4: All right, the TR4187 leaves at 13:59 and arrives at 15:27. Would you like me to book that for you? Sentence5: I have some moderate priced hotels in the north and center. Do you have a location preference? Sentence6: Booking was successful. Reference number is : P39PYOK0 . Can I help you with anything else? Sentence7: Where will you be traveling from, and what day would you like to travel? Sentence8: Yes, please book it for me. Sentence9: I would like a moderate price hotel in Cambridge. Sentence10: I also need info on a train. It should arrive in london liverpool street by 16:30. Sentence11: I need 4 tickets, and the price and train ID Sentence12: I will be departing Cambridge on Friday. Sentence13: Either one is fine. I need to book it for 5 nights on Wednesday. There are 4 people. Sentence14: There are two 2 star hotels in the north part of town. Ashley Hotel and Lovell Lodge. Both include free internet and parking. Do you have a preference? Sentence15: I will work on that and be back with you in a moment. Sentence16: Sure. What is your price range and what side of town will you be interested in? Sentence17: Hi, I am planning a trip and could use some advice on a place to stay. Sentence18: I'm not concerned about the area but it doesn't need to include internet. Sentence19: You're welcome, let me know if I can assist with anything else. Sentence20: Let me know when your break is over. I'll need a reference number please. Question: Who has spoken the sentence 9? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Yes, I think that would be fine. Something in the north, please. Sentence2: Sure, choose one for me. Sentence3: How about for 3 nights? Sentence4: Unfortunately, there is no availability at any of the 7 guesthouses for your needs. Do you want to book for another day or for a shorter stay? Sentence5: That did the trick. I was able to book for 2 people for 3 nights starting Wednesday at the Acorn Guest House. Reference number is G591ZUVT . Sentence6: One more question. How many people are in your party? Sentence7: Unfortunately, I don't have any hotels meeting those requirements, but I do have several guesthouses that do. Would you be interested in one of those? Sentence8: You're welcome. Goodbye. Sentence9: Not really. As long as it's in the north it's good. Sentence10: Thank you so much! That's all. Bye! Sentence11: Could you help me find a moderately priced 4 star hotel? Sentence12: Please make the reservation for 2 people. Sentence13: I need it for 4 nights starting on wednesday. Sentence14: There are 7 guesthouses that fit your needs. May I recommend Arbury Lodge Guesthouse? Sentence15: There is no availability at Arbury on Wednesday, unfortunately. Would you like to try a different hotel? Sentence16: Sure, that sounds fine. Can you book that for me? Sentence17: I have 7 guesthouses in the north that are moderately priced and 4 stars, are you looking for internet or parking? Sentence18: When and how long are you wanting to stay? I can see what is available. Question: Who has spoken the sentence 8? (A) User (B) System
Example Output:
Answer: (A) User