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

Example Input: Sentence1: Thank you for the help, have a nice day. Sentence2: Hi, kohinoor is a cheap Indian restaurant, but doesn't specify that it is South Indian. Would you like the phone number? Sentence3: There are 8 trains that will arrive by 21:45. What time would you like to depart? Sentence4: how about 17:00. Sentence5: Great! I am also looking for a train that leaves on thursday and departs from cambridge. Sentence6: Hi, I'm looking for a place to eat, preferably a cheap South Indian restaurant. Sentence7: How many tickets do you need? Sentence8: Yes, that would be great. Could I get a reference number please? Sentence9: Is it in the centre of the city? Sentence10: Would you like for me to book a table at Kohinoor for you? Sentence11: What's the last train to arrive by 21:45? Sentence12: Yes, it is indeed in the centre. The phone number is 01223323639 Sentence13: Destination is Stevenage. I would like to arrive by 21:45. Can you book the train for me as well? Sentence14: It would be the one leaving at 19:21 and arriving at 20:10. Shall I book it? Sentence15: I need 1 ticket. Sentence16: Booking was successful, the total fee is 12.8 GBP payable at the station . Reference number is : 5TM8STAM . Sentence17: What is your destination? Sentence18: Yes, please. 18:00 on Wednesday for just myself. Sentence19: I'm sorry, they're all booked up at that time. Would you like to try a different time? Sentence20: It was a pleasure to serve you have a great day Sentence21: I was able to book that, your reference number is HEJFVRPP . Sentence22: Ok, thank you. Question: Who has spoken the sentence 9? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Great I also need a taxi to take me between the two places and get me to the restaurant by 20:00 Sentence2: You are most welcome. May I help you with anything else, such as attractions? Sentence3: The University Arms is a 4 star hotel on Regent Street. Would you like me to make a reservation there? Sentence4: Booking was successful. Reference number is : VJQM2DFY . Anything else I can do for you? Sentence5: Is that in the centre area also, and in the expensive price range? That is what I'm looking for. Sentence6: In the centre, please Sentence7: Perfect!. Thank you for your help! Sentence8: Great, can you book for 1 person and 4 nights starting Wednesday. Sentence9: Have a great day! Sentence10: Yes, University Arms Hotel is a 4-star hotel in the expensive price range. Would you like to make a reservation? Sentence11: There are 33 expensive restaurants in the centre of town. Is there a specific type of cuisine you were looking for? Sentence12: Sure, which part of town did you want to eat in? Sentence13: Booking for the taxi complete look for a grey bmw car contact number is 07434690950 to arrive at the restaurant by 20:00 Sentence14: You have been booked at the Bedouin on Wednesday at 20:00 for 1 person. Your reference number is 29KJKZOD . Is there anything else I can help you with? Sentence15: I'm visiting the centre and want to go all out on the experience. Can you help me find an expensive restaurant? Sentence16: I need a place to stay. Sentence17: no, just surprise me. I need a reservation for 1 person at 20:00 on wednesday. Sentence18: No thanks, that's all I needed. Question: Who has spoken the sentence 15? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Yes, I need one in the cheap price range please. Sentence2: departure is sunday from ely. Sentence3: I'll book the one that leaves at 17:35. What time does the train arrive? Sentence4: Pizza hut city centre, ask, and zizzi cambridge all are italian restaurants in the centre part of town in the cheap price range. Would you like me to book one? Sentence5: No. Everything is perfect. Thank you for your time. Sentence6: I found four trains, one leaves at 17:35, 19:35, 21:35 or 23:35. Which would you like to book? Sentence7: I have reserved a table for three at 21:00. The reference number is OUN5OI0K . Sentence8: I need a train ticket to Cambridge, sometime after 15:45 if you can find one. Sentence9: There are 3 gastropubs in the centre. 2 are expensive the other is moderate. Do you have a preference in the price range? Sentence10: No. I'm looking for a a gastropub restaurant in the centre. Sentence11: There are no gastropubs in the centre part of town in the cheap price range. Would you like something else? Sentence12: It arrives at 17:52. Shall I go ahead and book it for you? Sentence13: Thank you for using this system! Sentence14: There are over 600 trains to Cambridge that leave after 15:45. Can you tell me the day you're traveling and your departure station? Sentence15: Yes. Can you please book Zizzi Cambridge for 3 people at 21:00 on the same day, Sunday. Sentence16: Ok, how about one serving italian food? Sentence17: That's an interesting question, but unfortunately I haven't that information. Is there anything else I can help you with, though? Sentence18: Finally. Thank you. Pizza Hut. I ate there when I was a kid. It's a long story. I wonder if this one has a jukebox. Question: Who has spoken the sentence 16? (A) User (B) System
Example Output:
Answer: (A) User