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

Example Input: Sentence1: Would you prefer Indian food or Italian food? Sentence2: Curry Prince is a moderately priced restaurant in the east part of town that serves Indian food. Would you like the phone number? Sentence3: I want a moderately priced restaurant in the east part of town. What is the phone number? Sentence4: You're welcome, goodbye. Sentence5: Awesome, thank you! Goodbye! Sentence6: The phone number for Curry Prince is 01223 566388. Sentence7: I don't care. Give me their phone number. Sentence8: Yes give me the phone number. Question: Who has spoken the sentence 7? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Yes, where would you like to go to? Sentence2: Is there an area you'd prefer to stay in? Sentence3: Yes, book that one please. Sentence4: No free parking is not necessary. Sentence5: I prefer a moderate price one. Sentence6: Your room is reserved, ref# UCVH6QPU . Is there anything else I can help you with today? Sentence7: Would you help me book a train for Thursday, please? Sentence8: Can I get the reference number for that booking? Sentence9: There are over 200 trains going to Cambridge on Thursday. Where will you be departing from? Sentence10: Your booking was successful. Your reference number is Z3NAOPSY . Sentence11: Is that for 2 people? And I need it for 5 nights starting thursday. Sentence12: I would like a cheaper hotel. Sentence13: I would like to go to Cambridge Sentence14: That narrows us down to about 19 trains. Do you have a time you would like to leave after or arrive by? Sentence15: Ok I Am going to book a cheaper hotel for you ,have a good day,thank you. Sentence16: There is nothing in the price range you mentioned. Would you be willing to stay at a cheap hotel or an expensive hotel? Sentence17: Not that's it. Thank you so much! Sentence18: In the east. With free wifi, please. Sentence19: Do you need free parking? Sentence20: I would like to leave after 15:45. Sentence21: Yes, please. I am also looking for a place to stay, ideally a hotel with a 4 star rating in the moderate price range. Sentence22: Then in that case, I recommend the TR0209 which departs from Kings Lynn at 16:11 and gets into Cambridge at 16:58. Would you like me to book it for you? Sentence23: I'm sorry, let's get your hotel choice fixed first. There is one cheap hotel - The Cambridge Belfry. It has free internet and parking. Can I book this one for you? Sentence24: I found 3 guesthouses matching that criteria, I would recommend the Carolina Bed and Breakfast. Located in the east, 4 stars, and has free wifi. Will this one work? Sentence25: I will be leaving from Kings Lynn. Sentence26: Ok. Thank you for choosing Cambridge Towninfo Centre. We hope you enjoy your stay. Question: Who has spoken the sentence 13? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Yes, I'd like to leave Thursday, what are the departure times and travel times? Sentence2: That's not necessary. I need a place to stay too. Sentence3: No thank you that was all I needed. Good bye. Sentence4: Thank you and enjoy your stay. Sentence5: The first leaves at 05:29 and the last pulls out at 13:29. How many tickets please? Sentence6: Would it be possible to book it for eight people for four nights? Sentence7: Okay, do you know what sort of place you want or where located? Sentence8: When will you be departing and where will you be departing from? Sentence9: Sounds great. Can I get more information on finches bed and breakfast please? Sentence10: There 35 trains to choose from, do you have a preference on a date and departure time? Sentence11: On Sunday, please. Sentence12: I need to leave from Cambridge and arrive by 14:30 in Bishops Stortford. Sentence13: I need to find a train to bishops stortford please. Sentence14: I need a hotel in the west , free parking is not necessary but it should be rated 4 stars. Sentence15: Okay, when would you like to begin your stay? Sentence16: How about finches bed and breakfast? They are in the west and have an excellent 4 stars. Free internet and parking! Sentence17: Booking was successful. Reference number is : JFMQZLIX . Is there something else I can assist you with? Sentence18: Finches address is 144 thornton road, postcode cb30nd. May I book it for you? Question: Who has spoken the sentence 16? (A) User (B) System
Example Output:
Answer: (A) User