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

[Q]: Sentence1: The address is 41 Warkworth Street. Can I help you with anything else today? Sentence2: Yes, I'm looking for a guesthouse with a star rating of 1. It should be in the city centre please. Sentence3: Enjoy your trip. Sentence4: Hi! I'm looking for someplace to go in the centre. Sentence5: No that was all I needed. Thank you, goodbye. Sentence6: I don't have any guesthouses that meet that criteria. Would you like me to try something else? Sentence7: Do you have any guesthouses with a star rating of zero? Sentence8: You are booked for a yellow audi. Your contact number is 07526986404. May I help you with anything else? Sentence9: What is your departure site? Sentence10: No not right now. What is their address? Sentence11: I'm sorry, we need a taxi departing from Saint Mary's Church by 3:15 going to the guesthouse. Sentence12: Yes, I do have one. The El Shaddai is in the centre and is cheap. It is 0 star rated and offers free parking and wifi. Do you need a room? Sentence13: It does not really matter can you suggest one? Sentence14: how about little saint mary's church? Sentence15: Okay, there's plenty to do in the city's centre. What kind of attraction are you interested in? Sentence16: I also need a taxi to get to little saint mary's church by 3:15. Sentence17: It is an architecture attraction it's located on little saint mary's lane postcode cb21qy. Is there anything else I can help you with? Sentence18: Sounds perfect. Is it architectural? Also, can I have the address with postcode? Question: Who has spoken the sentence 16? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: I do not have all of that information at this time. Can I talk to you again when I know more? Sentence2: I am looking for a hotel with free parking in the North. Sentence3: Okay. Please help me book this guesthouse. Sentence4: Yes that is all right. Sentence5: Yep there are 5 guesthouses. Do you wanna just try acorn guest house? Sentence6: Are any of those 11 guesthouses? Sentence7: Does it offer free wifi? Sentence8: It's my pleasure. Have a nice trip! Sentence9: What day, number of nights, and number of people would you like to book for? Sentence10: Thank you for your help! Sentence11: Yes, it does have internet. Sentence12: There are 11 hotels that meet your needs. Would you like to narrow them down by price range? Question: Who has spoken the sentence 9? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: Of course! Your confirmation number is : NA5IKOHZ . Can I assist you with anything else today? Sentence2: Okay, sorry about the wait. I have booked 8 tickets for train TR7324. It will leave 21:40 and costs 600.79 GBP. The reference number is 2I340EJN . Sentence3: Thank you so much! Sentence4: Great, thanks so much Sentence5: Okay, let me work on booking that and I will be back with you shortly. Sentence6: Yes please. And I need the reference number please. Sentence7: Yes please, 8 people for 5 nights starting thursday, and can I get the reference number? Sentence8: How many tickets will you need? Sentence9: Can you help me find a place to stay maybe a expensive guesthouse? Sentence10: Have a great day. Goodbye. Sentence11: I have no expensive guesthouse's. Would you like to try a hotel or a different price range? Sentence12: Well, I preferred a guesthouse but since there are none, can you see if there are any hotels with my other specifications staying the same? Sentence13: That's great! I need a train. It should leave after 20:45 from Birmingham New Street. Sentence14: I have three trains. Do you need to book some tickets? Sentence15: what day, monday or friday please? And how many tickets? And are you going to Cambridge? Sentence16: I will need eight tickets please. Sentence17: I am showing nothing matching your request. Did you want to try another search? Sentence18: I was really wanting a guesthouse in the east with an expensive price range and include free parking. Sentence19: Yes, I'm going to Cambridge and I need to leave on Thursday. Sentence20: express by holiday inn cambridge fits that description. can i book for you? Sentence21: rad that's all i need now Sentence22: I will work on booking this for you and be back with you shortly. Question: Who has spoken the sentence 13? (A) User (B) System
[A]:
Answer: (B) System