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

[Q]: Sentence1: Tuesday please at 18:15 for 6 people. Sentence2: Your booking at the Gonville Hotel was successful. The reference number is FHD472H3 . Can I help with anything else today? Sentence3: We have an expensive hotel called gonville hotel with free internet and parking. Would you be interested in booking a room here? Sentence4: Thanks, you have been very helpful. That is all I needed. Bye. Sentence5: I 'd like to find a hotel in the same area, one with three stars. Sentence6: What sort of dining does Cambridge offer in the centre, in the moderate price range? Sentence7: Yes it has free wifi and free parking. Sentence8: There are 21 different choices. What kind of food are you looking for? Sentence9: Your table at Ali Baba is booked, reference #NYH3ZPQN . Is there anything else I can help you with today? Sentence10: That sounds perfect. Can you book a reservation for 5 nights starting on Tuesday for 6 people? Sentence11: That will work can you make a reservation and send me the reference number please? Sentence12: I would like some christmas food. Sentence13: How about somewhere with Lebanese food? Sentence14: Thank you for using Cambridge TownInfo. Have a great day! Sentence15: Does it have free wifi? Sentence16: I'm sorry. I could not find a restaurant that meets that criteria. Would you like to try something else? Sentence17: of course, what day shall i make the reservation for? Sentence18: Yes, there is a moderately priced Lebanese restaraunt in the centre named Ali Baba. How does that sound? Question: Who has spoken the sentence 9? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: There are no architectural attractions anywhere in town? Sentence2: Alexander bed and breakfast is available, would that work for you? Sentence3: from what day should i book? Sentence4: Yes, I am looking for an expensive place to stay that includes free parking. Sentence5: Sure, that sounds good. Could you give me the information on All Saints Church? Sentence6: All saints church is listed as architecture, would you like to go there? Sentence7: I could not find any attraction that match your request. Can I look for museums? Sentence8: I'm just looking for something that is a guesthouse in the cheap price range. Sentence9: Sure! I have a few places in mind, but can you tell me if you prefer a particular area? Sentence10: No that was it. Thank you so much for your help. Sentence11: It is in the centre located at Jesus Lane and the entrance is free. Their phone number is 01223452587 and the postcode is cb58bs? Anything else I can help with? Sentence12: Starting Thursday. Sentence13: I'm looking for any type of architectural attractions in town. Do you have any recommendations? Sentence14: You have a room booked for Thursday. Reference number is U3DO9AJP . Can I help with anything else? Sentence15: Thank you and goodbye. Sentence16: can you book for 4 people 5 nights and get me the reference number please? Question: Who has spoken the sentence 6? (A) User (B) System
[A]: Answer: (A) User

[Q]: Sentence1: Hobsons house is a guesthouse and the postcode is cb39lh. It is in the moderate price range. Would you like to book a room? Sentence2: I need a train from broxbourne Sentence3: Do you have time travel preference? Sentence4: Booking was successful for TR5979, the total fee is 143.19 GBP payable at the station. Your reference number is : CNUS8VFV . Can I help you with anything else? Sentence5: I'm looking for a hotel with free wifi. It doesn't need to have free parking. Sentence6: Yes, please book this for 8 people. I will also need the reference number. Sentence7: Certainly, the postcode for gonville hotel is cb11ly. the price range for the hotel is expensive, but I don't have the actual price. Sentence8: Okay then, you have a wonderful day! Sentence9: Thank you. That's all I need for now. Sentence10: No thank you. I just need the price and the postcode please. Sentence11: Is that a hotel. If so, could you get me the postcode and price range please. Sentence12: I need to leave on Thursday. Sentence13: My apologies about the confusion, it looks like the best option for you is the TR5979, which leaves at 10:32 and arrives at 11:32. Shall I book this for you? Sentence14: No, I'll book one when I get there. Thank you for your help! Sentence15: I'm happy to have been of service. Is there anything else I can help you with today? Sentence16: Yes, time travel would be fine. But I need to get to Cambridge by 11:45 at the latest. Sentence17: Will a guesthouse do, or are you only interested in a hotel? Sentence18: No that is all I needed. Sentence19: What day would you like to travel to Broxbourne? Sentence20: Just a hotel, and it needs a three star raiting. Sentence21: I've got the gonville hotel with a 3 star rating. Would you like me to make a booking for you? Sentence22: hobsons house looks good, it's got a 3 star rating and wifi. would you like me to book it? Question: Who has spoken the sentence 20? (A) User (B) System
[A]:
Answer: (A) User