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

[EX Q]: Sentence1: Okay. Sorry for the mix-up. Thanks for checking. Sentence2: The travel time is 105 minutes and the cost is 37.80 pounds. Sentence3: I'm looking for something in the expensive price range. Sentence4: I would like to recommend Ugly Duckling. Would you like me to make reservations for you? Sentence5: Yes, a table for 1 at 20:30. But could you check the train again? I need to leave from Liecester, not arrive there. Sentence6: No you have been a great help, thanks. Sentence7: TR6723 leaves on monday from cambridge arriving in leicester at 16:06. Would that work for you? Sentence8: Now that your reservation at Ugly Duckling is taken care of, is there anything else I can assist you with today? Sentence9: We have 77 options available. Is there a certain day you want to travel? Sentence10: I have your table for 1 booked at the Ugly Duckling, Monday at 20:30. The reference number is YDG81NJ5 . Just a moment while I check on the train. Sentence11: Yes, I'd like to leave on Monday, going to Cambridge from Leicester. Sentence12: It was a pleasure to help you. Thanks for using our service. Goodbye. Sentence13: Okay, I also need a Chinese restaurant in the centre, please. Sentence14: Could I have the travel time and price for that particular train? Sentence15: Yes I can book that for you if you would like. Sentence16: I have 10 restaurants in the centre area that have chinese. Do you have a certain price range in mind? Sentence17: Yes, that would be great. Thank you. Sentence18: I am looking for a train that leaves Cambridge going to Leicester arriving by 16:15 Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Yes, all of the listed entrance fees are 5 pounds. The Club Salsa is nice. Sentence2: Have fun! Goodbye! Sentence3: Club Salsa's address is 1 Station road and their phone number is 07782218745. Sentence4: No thanks. That's it. Sentence5: Location doesn't really matter. Is there an entrance fee? Sentence6: Yes, would you like to find a nightclub in the centre or south part of town? Most of them are in the centre. Sentence7: Club Salsa sounds right up my alley. Can I get the address and phone number please? Sentence8: Can you find information about nightclubs? Sentence9: You're welcome. Can I help you with anything else? Sentence10: Okay, great! Thanks for your help! Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: You're welcome. Call back if you need further bookings or assistance. Sentence2: On Friday after 10. Sentence3: What you are looking for can not be found. Is there any other area you would mind searching in? Sentence4: Can you also give me the travel time? Sentence5: Thanks! Can you also see if there are any expensive, 4-star guesthouses in the north area of town? Sentence6: Yes, that will be great. How much does a ticket cost? Sentence7: A ticket is 23.60 pounds. Sentence8: Okay. What day will you be traveling? Sentence9: Avalon is a moderate priced 4 star guesthouse in the north part of town. It has free internent. Would you like more information or can I book it for you? Sentence10: Can you book it for 4 people and 4 nights starting from Monday? Sentence11: The travel time is 51 minutes. Sentence12: Booking was successful.Reference number is : 1VF2W9YC . Sentence13: The TR1502 leaves friday at 11:00. Sentence14: No I want to stay in that area. What other hotel accomadations are in the area? Sentence15: I need to take a train from Cambridge to London Kings Cross, it would need to be after 10. Sentence16: Thank you! That is all. Question: Who has spoken the sentence 9? (A) User (B) System
[EX A]:
Answer: (B) System