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

[Q]: Sentence1: Where will you be travelling to? Sentence2: Yes but I need that to be booked for 3 people. I would like the reference number please. I also need a place to stay as well. Sentence3: Sure thing, I would suggest this one acorn guest house. Sentence4: I will be traveling to Leicester and would like to arrive before 21:15. Sentence5: I would like a 4-star guesthouse in the north in a moderate price range. Sentence6: Great can you book that for me from Sunday for 2 nights for 4 people. Sentence7: I would like to arrive by 21:15. Sentence8: When could you like to arrive by? Sentence9: Your booking was successful. Your reference number is 7ZJ4CTTG . Will that be all for today? Sentence10: Booking was successful, the total fee is 113.4 GBP payable at the station. Your reference number is ABKFF3SH . What type of place are you looking for? Sentence11: I'm looking for a train that leaves from Cambridge on Tuesday. Sentence12: I have the TR8207 that will arrive by 21:06. Would you like me to book that for you? Question: Who has spoken the sentence 4? (A) User (B) System
[A]: Answer: (A) User

[Q]: Sentence1: There are 5 expensive Indian restaurants available in the west. Would you like me to book one of those for you? Sentence2: Can you help me find and expensive restaurant in the west? Sentence3: I would like to eat at an indian restaurant please. Sentence4: You are welcome. Thank you for calling Cambridge TownInfo Centre. Good bye. Sentence5: Yes, please choose one and book it for 6 people at 13:30 on Thursday. Sentence6: We have nine. What sort of cuisine would you like? Sentence7: No, that's it for today. Thank you for all your help. Good bye. Sentence8: Ok. I was able to book cocum on thursday at 13:30 for 6 people. Your reference number is LTZ2TPIA . Can I help you with anything else? Question: Who has spoken the sentence 3? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: OK, I have a grey Volvo picking you up at the riverboat georgina and heading to the acorn guest house at 10:15. The contact number is 07727986161. Will that be all? Sentence2: You could check out the riverboat georgina, located with the cambridge passenger cruisers at the jubilee house. Sentence3: Thank you, and have a great day! Sentence4: Sure. The address is 154 Chesterton Road, the phone number is 01223353888 and it is a 4 star hotel. Anything else I can help with? Sentence5: I am looking for something to do on the north side of town. Sentence6: Very well. I also want to book a taxi to take me there, to leave by 10:15. Sentence7: I don't need a reservation right now. Just the address, postcode, and number of stars for that hotel, please. Sentence8: The part of town doesn't matter, and I don't need free parking. Which would you recommend? Sentence9: yes, that is all good bye Sentence10: The acorn guest house is nice. Would you like to book a reservation there? Sentence11: The address is cambridge passenger cruisers, jubilee house. Sentence12: There are 17 offerings. What part of town are you interested in? Sentence13: Moderate price range. Sentence14: Sounds good. What's the address? Sentence15: Also, can you find me a place to stay, in moderate price and includes free wifi? Sentence16: Is there a price range you would like to look for? Question: Who has spoken the sentence 4? (A) User (B) System
[A]:
Answer: (A) User