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

Example Input: Sentence1: I don't care when I arrive, but I need to leave after 10:00. Sentence2: Perfect, thanks so much for your help. Sentence3: Yes. Wednesday please. Sentence4: I have successfully make a booking for 5 on that train. Sentence5: Sounds great. Can I get their postcode please? Sentence6: Is there anything else I can assist you with today? Sentence7: Can you find me a train from Stansted Airport? Sentence8: Alright, thanks for contacting Cambridge TownInfo centre! Have a good day. Sentence9: TR0467 leaves the airport at 10:24. Would you like tickets for that train? Sentence10: No that is everything. Have a good day. Sentence11: Queen's college is an excellent choice. Sentence12: The postcode for Queen's College is cb39et. And the reference number for your train (booked earlier) is WMUC700A . Sentence13: Can I have the reference number please? I'm also looking for some places to go, maybe a college in the west. Sentence14: Not a problem. Any day in particular? Sentence15: There are plenty of options. Where will you be arriving and do you have a time preference? Sentence16: Yes, for five please. Question: Who has spoken the sentence 14? (A) User (B) System
Example Output: Answer: (A) User

Example Input: Sentence1: I'd like to find a train going to Cambridge that leaves on Sunday. Sentence2: Okay. It's a 3-star guesthouse in the north area with no internet or parking. Is there more you would like to hear? Sentence3: I would be leaving from Peterborough. I need to arrive in Cambridge by 19:30 though. Sentence4: My departure time is flexible. Sentence5: The earliest train is TR3782 which leaves at 05:19, would you like me to book some tickets for you? Sentence6: That sounds great. Can I just get the postcode please? Sentence7: No, I believe that is everything. Thank you. Sentence8: I am also looking for a hotel called alpha-milton guest house. Sentence9: Ok, and where are you departing from? Sentence10: No, that won't be necessary. I would like to get the price, though. Sentence11: Not a problem, please contact us again if you need any further assistance. Sentence12: Of course. The price for the train running from peterborough to cambridge on Sunday is 13.20 pounds. Is there anything else I can assist you with? Sentence13: The post code of the alpha-milton guest house is cb41xa. Is there anything else I can assist you with today? Sentence14: Okay, there are a few trains available. What time would you like to depart? Question: Who has spoken the sentence 5? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: I've booked you at fitzbillies restaurant. Your reference number is X5JH9O7F . What else can I help you with today? Sentence2: I'd like something expensive please. Sentence3: Yes, there are a number of options. Did you have a price range in mind? Sentence4: Yes, whatever you recommend will be fine. I need a reservation for monday at 10:15. 2 people please. Sentence5: I'm going to Bishops Stortford. Sentence6: We have three options that meet your criteria. Would you like a recommendation? Sentence7: You're welcome, let me know if I can assist with anything else. Sentence8: yes please and I need the price and arrival time Sentence9: Oh, that's too bad. I do need something in the center. Is there any British food? Sentence10: Just 1 ticket please. Sentence11: How many tickets do you need? Sentence12: I am looking for a train leaving cambridge after 15:00. Sentence13: what is your destination? Sentence14: Yes, I would like to find an expensive Austrian food. Sentence15: The TR2730 leaves at 15:29. Do you want to book it? Sentence16: Booking was successful, the total fee is 10.1 GBP payable at the station. Your reference number is : 12VHBCG9 . Can I help with anything else today? Sentence17: I'm sorry, but there are no Austrian restaurants anywhere in Cambridge. Would you like to try a different type of cuisine? Sentence18: Great! Thank you! That's all I need. Question: Who has spoken the sentence 9? (A) User (B) System
Example Output:
Answer: (B) System