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

[EX Q]: Sentence1: No thank you. I have everything I need. Sentence2: The earliest train leaving after 11:45 is at 12:09 on friday. Would you like me to book this for you? Sentence3: I need 1 ticket for departure on Thursday. Sentence4: i need a train going to leicester that leaves after 11:45 Sentence5: That is fine. Can I have the train ID once it's booked? Sentence6: Of course, what day will you be traveling, and how many people will be in your party? Sentence7: I was successfully able to book you a reservation for 7. The reference number is R2RPLBI3 . Can I help you with anything else? Sentence8: There is one restaurant called bedouin, but unfortunately it does not have any open reservations for matching your specifications. Could you provide another day or time? Sentence9: Yes I want to reserve a table for 7 people at 15:00 on Thursday at an expensive African restaurant. Can you help me with this? Sentence10: Could you get a reservation at a difference expensive African restaurant? Sentence11: There are no tables available at Bedouin at that time. Would you like to try a different time slot or perhaps a different day? Sentence12: I will be departing leicester going to cambridge, sorry for the confusion. I need to leave after 11:45 also. Sentence13: Sure. If there are no other African eateries to choose from, try the 14:00 at the Bedouin. Sentence14: Sure, are you going to leicester, or to cambridge? What is your departure site please? Sentence15: Great. I have booked you one seat on the 12:09 train from Leicester and your reference number is 7UR3BFW6 . Is there anything else I can do for you? Sentence16: You are welcome. Good bye. Question: Who has spoken the sentence 15? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: Thank You good bye Sentence2: Yes. Kymmoy is an expensive restaurant serving asian oriental food in the centre part of town. Sentence3: Thank you. May I have their phone number? Sentence4: Their number is 01223 311911. Will that be all today? Sentence5: Yes, thank you. Sentence6: There is not matching places that fits your request. Can i help you with something else? Sentence7: Are there any Asian Oriental restaurants in that price range? Sentence8: I'd like to find an expensive restaurant that serves venetian food. Question: Who has spoken the sentence 7? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: TR0060 leaves at 19:29 and arrives by 20:07. Does that work for you? Sentence2: I'm leaving from Bishops Stortford on Thursday. I'd like to leave after 18:30. Sentence3: Your reference is TTZCS4Y4, is there anything else you need? Sentence4: I am planning to visit Cambridge soon and need schedule information. Sentence5: No, that is everything I needed. Thank you. Sentence6: Can we try for 1 night instead of 3? Sentence7: Unfortunately they are all booked for that duration. Would you like to try another hotel? Sentence8: That's OK, I won't have a car with me. Can you book the Avalon for 3 people for 3 nights, starting Thursday? Sentence9: I am happy to help, when will you be traveling and where will you be coming from? Sentence10: Yes, those times are good for me. Would you give me the price and train ID, please. Sentence11: The Avalon is a 4 stars guesthouse in the north, the price is moderate. There is not free parking in this hotel. Sentence12: Thank you for contacting Cambridge TownInfo centre. Have a great time! Goodbye! Sentence13: The train id is TR0060 and the price is 10.10 pounds. Would you like me to book that for you? Sentence14: Not at this time, thanks. But I would like to look for some hotel information. A friend told me to check out the Avalon. What can you tell me about it? Question: Who has spoken the sentence 9? (A) User (B) System
[EX A]:
Answer: (B) System