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'm looking for an expensive restaurant to dine at, somewhere in the North End of the Cambridge area. Sentence2: I have many different times available. The first one leaves at 12:26 followed by 13:36, 14:36, 15:36, and so forth until 23:36. Which time would you like best? Sentence3: I'm glad I was able to help! Thank you for using the Help Desk. Have a great day! Sentence4: I have many trains leaving from Cambridge to London kings cross on Friday. What time would you like to book the train for? Sentence5: There are 5 expensive restaurants on the north side of town. What type of food would you like? Sentence6: Thanks! I also need to book a train leaving Cambridge on Wednesday. Sentence7: Any type of food is fine. Can you book a table someplace that sounds good? I need a table for 4 on tuesday at 19:30. Sentence8: Uuh... actually, I'm headed to norwich from cambridge on Wednesday. Sentence9: I apologize see that the TR5574 leaves Cambridge for Norwich Wednesday at 12:36 and arrives at 13:55. Will that work for you? Sentence10: I have booked you a table for 4 on Tuesday at 19:30 at Saigon City, on the north end of Cambridge at 169 High Street Chesterton and your reference number is JARZR20Q if you need to contact them between now and then. Sentence11: 12:26 should be okay can I please get the train ID and travel time? Sentence12: Sorry about the confusion on that, what time would you like to depart? Sentence13: Thank you for that information, that is all I need at this time. Sentence14: I would like to leave after 12:00 please, what do you have available? Question: Who has spoken the sentence 13? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: book a table for 6 people at 11:15 on tuesday at the Hakka Sentence2: Sure what type of food are you wanting to eat? Sentence3: Do they have free wifi? Sentence4: I booked the taxi, it is a yellow tesla the contact number is 07809860598. Is there anything else I can assist with today? Sentence5: I will need a taxi to get to the restaurant. Sentence6: Booking was successful, and your reference number is TDVD6XSM . Is there anything else I can assist you with? Sentence7: That is all, thank you for your help. Sentence8: The Hamilton Lodge sounds perfect for you. Would you like to know more? Sentence9: I'm glad we were able to help. Sentence10: I would like to find an expensive restaurant in the north part of Cambridge. Sentence11: Yes, they do have internet. Shall I make a booking? Sentence12: There 2 of them - the Hakka and the hotpot. Which one would you like to try? Sentence13: Yes please. I want 4 nights from tuesday, and for 6 people. Give me the reference number too. Sentence14: I am looking for a hotel in the same area that has free parking. Sentence15: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 48WF5G7X . Can I help with anything else? Sentence16: How about chinese food? Question: Who has spoken the sentence 15? (A) User (B) System
Example Output: Answer: (B) System

Example Input: Sentence1: Can you help me find a restaurant in Cambridge called Loch Fyne? Sentence2: I think this would be a good time to end the dialogue. Goodbye. Sentence3: I have a lot of different attractions. Would you like a college or museum? Sentence4: Can you go ahead and make a reservation for 7 people on Wednesday, around 16:30 for me? Sentence5: I would like it to be in the West. Sentence6: Are you interested in things to do in the centre, or perhaps a different area? There is so much to do! Sentence7: Okay great! What is their phone number please? Sentence8: I sure can! Loch Fyne is an amazing seafood restaurant located in the centre of town. They are relatively expensive. Would you like any more info for them? Sentence9: That's all I need today. Thanks for all your help! Sentence10: I would suggest cafe jello gallery located at cafe jello gallery, 13 magdalene street. They have free entry. Sentence11: Yeah, anytime. I am happy I could assist. Sentence12: The phone number is 01223312112. Can I help with anything else? Sentence13: You're all set. Your reference number is D07SIPBF . Sentence14: The attraction should be in the west and should be in the type of museum. Sentence15: Thanks so much. I am also looking for places to go in town. Can you help me with that? Sentence16: Have a great day. Good Bye. Question: Who has spoken the sentence 13? (A) User (B) System
Example Output:
Answer: (B) System