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

[EX Q]: Sentence1: Galleria serves European food and is in the centre part of town and has a moderate price range. Sentence2: No restaurants serving australasian food can be found. May I find another type restaurant for you? Sentence3: Looking for someone that serves Australasian food? Sentence4: How about European food? Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I'm also looking for a train. It should depart Cambridge after 14:15 and arrive in Norwich on friday. Sentence2: I have a 3 star hotel and a 4 star hotel both in the centre. Would you like to book one of them? Sentence3: I'm looking for a hotel to stay at. I want it to be at least 2 stars and in the center of town. Sentence4: TR8314 departs Cambridge at 14:36 and arrives in Norwich at 15:55. Would you like me to book a ticket for you? Sentence5: 1 ticket on TR8314 has been booked. Your total is 17.6 GBP, which you can pay at the station. Your Reference number is : H0JS8RMF . Sentence6: I am not finding a 2 star in the centre. Are you sure there is not another type of hotel you would like? Sentence7: Do you have anything that is 2 star rated in the centre? Sentence8: YES PLEASE. FOR 1 PERSON. Sentence9: I have 2 options - one is cheap and one is expensive. Which price range would you prefer? Sentence10: Thank you for calling. Have a great day! Goodbye. Sentence11: I do need a place to stay, so are there any 4 star hotels available? Sentence12: we got none. can i help you with anything else? Sentence13: That is all I need. Sentence14: cheap will work. can you book it for Wednesday? 1 person, 2 nights. I'll need the reference number too. Sentence15: Thanks, that was all I needed today. Goodbye. Sentence16: I was able to book a room at Alexander bed and breakfast, your reference number is VWF48IZM . Is there anything else I can help with? Question: Who has spoken the sentence 12? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Great! You're booked on TR9187 with reference number MJJ7J6CV . Is there anything else I can help with? Sentence2: The first train leaves at 06:21 and arrives at 08:06. How many tickets would you like please? Sentence3: I'll be happy to book a room for you. How many nights and how many people? Sentence4: Then how about one that is in the cheap price range? Sentence5: Yes! I also need to find an expensive guesthouse in the north. It should have plenty of free parking for my fancy car. Sentence6: Sure! There are plenty of trains going to Leicester. What city will you be departing from? Sentence7: There are 2 options. City Centre north has a rating of 0 stars and Worth House has a rating of 4 stars. Would you like me to book either of them? Sentence8: I would like to go and visit Leicester. Do you think you can help me find a train to get me there? Sentence9: Worth House sounds good. Thank you. Sentence10: I will be leaving from cambridge. Sentence11: Sure,thanks for using this service. Sentence12: Perfect. What day would you like to travel on? Do you need to depart or arrive by a certain time? Sentence13: I will be traveling on Sunday and would like to arrive by 08:30 please. Sentence14: I need it for eight people, please. Sentence15: I actually just needed the information. That's all I need for now. Thank you. Goodbye. Sentence16: I am sorry, there are no expensive guest houses in the north with free parking. Would you like to try another area? Question: Who has spoken the sentence 11? (A) User (B) System
[EX A]:
Answer: (B) System