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

Ex Input:
Sentence1: I sure can. What type of place are you looking for? Sentence2: I'm looking for a place to stay, can you help me out? Sentence3: I'm looking for a guesthouse that's moderately priced. Sentence4: Please provide me with attraction type preference that you may have so that I can narrow down to a few choices. Sentence5: There are 11 options which fit your requirements. What part of town do you prefer? Sentence6: Thank you very much. I think that is all the information I need today! Sentence7: Perfect I have you booked at the Avalon for 5 nights and 5 people, the reference number is I3B3EKYI . Is there anything else I can help you with? Sentence8: Preferably in the centre. Would like a reservation for 5 people, for 5 nights beginning Wednesday. Also looking for places to go in the centre as well. Sentence9: Sure, let us try the North. Sentence10: I need it in the centre and you can make a suggestion. Sentence11: I would either recommend Avalon or Limehouse. Both are great guesthouses. Which of those would you like me to book for you? Sentence12: Please give me their phone number and postcode Sentence13: Do you have a specific area or attraction type in mind? Sentence14: I would like to be in the centre, please provide me with an entrance fee, a phone number and post code. Sentence15: There are no places to stay in Centre matching your request. Would you like to try another part of town? Sentence16: Something moderately priced, but a 4 star accommodation. And I would like free wifi too please. Sentence17: I'm also looking for places to go around town Sentence18: You are welcome. Enjoy your trip. Goodbye Sentence19: Let's go with the Avalon. Could you make it for 5 people for 5 nights? We want to arrive Wednesday. Sentence20: Ruskin gallery is a museum in the centre of town and very popular. The entreance is free. Sentence21: That's great information, but so many options! Is there a part of town that you would like to stay or other amenities you would like to have while in town? Sentence22: The phone number is 01245493131 and post code is cb11pt. Question: Who has spoken the sentence 12? (A) User (B) System

Ex Output:
Answer: (A) User


Ex Input:
Sentence1: I'm sorry, but there are no restaurants that meet your criteria. Would you like to broaden your search? Sentence2: There are 5 places that serve European. Did you prefer modern European, or just European food in general? Sentence3: Yes, please. I will need 8 tickets, and please give me the reference number once you book. Sentence4: What about a restaurant that serves european food? I'd like the phone no. and postcode to that, please. Sentence5: Sounds lovely. Thank you so much for all of your help! Sentence6: How about the Galleria? Their phone number is 01223362054 and the address is 33 Bridge Street, the postcode is cb21uw Sentence7: What time do you want to depart? Sentence8: I also need a Thai restaurant in the moderate price range. Sentence9: There is only one train that would meet your criteria closely and it leaves at 11:50 and arrives in Ely at 12:07. may I book that for you? Sentence10: I have successfully booked you 8 tickets. Your reference number is 0YY5WZQ6 . Is there anything else you need? Sentence11: First, may I confirm that your departure site is Cambridge? Sentence12: Just european food in general, please. Sentence13: hi I want a train to Ely arrived by 13:45, can you help me do that? Sentence14: Thank you for using this system. Sentence15: That is correct. Sentence16: Any time is fine as long as it's on Saturday. Question: Who has spoken the sentence 11? (A) User (B) System

Ex Output:
Answer: (B) System


Ex Input:
Sentence1: Thank you! Enjoy your visit to Cambridge. Goodbye. Sentence2: May I have the postal code for the Gallery as well please? Sentence3: Okay, I have booked the 17:00 train for you. The arrival time is 17:51. Your reference number is FGAHEJD9 and the price is 23.60 pounds. Sentence4: We have quite a few options available to you. Is there a particular day you are looking to travel? Sentence5: It doesn't matter. Sentence6: Yes please. Could you also tell me how much it is & what time it arrives? Sentence7: No, that's all I needed. Have a nice day. Sentence8: I need assistance finding a train departing from Cambridge and arriving at London Kings Cross. Sentence9: Yes, it's cb30aq. Is there anything else I can tell you about it? Or something else I can help you with? Sentence10: Lynne Strover Gallery's address is 23 high street, fen ditton, entrance is free. Can I do anything else for you today? Sentence11: TR0945 leaves on tuesday at 17:00. Would you like me to book it for you? Sentence12: I'm leaving after 15:15 on Tuesday. What's available then? Sentence13: I have four, what time would you prefer to arrive by? Sentence14: I am also looking for a particular attraction. The name of the place is Lynne Strover Gallery. Can you give me the address and fee? Question: Who has spoken the sentence 5? (A) User (B) System

Ex Output:

Answer: (B) System