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

[EX Q]: Sentence1: Price doesn't matter. Do they have free parking? Sentence2: I need an expensive restaurant in west Cambridge. Sentence3: No I just need the reference number for the reservation for 3 people on Sunday at 16:15. Sentence4: Give me the address and phone number for the one you most recommend Sentence5: There are 33 options for lodging in town. Do you have a preference for area, price range, type, or star rating? Sentence6: No I am good! I do not need a taxi. Sentence7: Yes, both the establishments offer free internet as well. Sentence8: Do they have free wifi also? Sentence9: I would like a place to stay Sentence10: There are two places that meet your search criteria. Did you have a price range in mind? Sentence11: I have 5 restaurants that match what you're looking for. Would you like to try Tandoori Palace? Its located at 68 Histon Road Chesteron. Sentence12: No I believe we have got everything done. Goodbye. Sentence13: Do they offer free parking? Sentence14: I want Indian food. Sentence15: In terms of type, I want a hotel. And I'd like 4 stars and wifi as well, with a location in the south Sentence16: Happy to help. Have a great day. Sentence17: Yes, they do offer free parking. Can I book a room for you? Sentence18: We have several to choose from. Did you have a specific cuisine in mind? Sentence19: Sure. The reference number is CBAGG03S and your table will be reserved for 15 minutes. Is there anything else today? Sentence20: No thank you. I have all the info I need. Sentence21: Rosa's Bed and Breakfast is the one I recommend. It's address is 53 Roseford Road and it's phone number is 01223512596 Sentence22: Yes as a matter of fact they do. Sentence23: Will you need a taxi to get to tandoori palace? I can help with that. Sentence24: Can I help you with anything else today? Sentence25: I will book that for you. Would you like the phone number in case you change your mind? Sentence26: Sure, can I get a reservation for Sunday at 16:15? I will need a table for 3. Question: Who has spoken the sentence 16? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Thank you. That's all I need. Sentence2: I was able to book it, reference number is T2SNWPJA Sentence3: Okay, the Mahal of Cambridge serves indian food and is located in the centre. Would you like me to make a reservation for you? Sentence4: I am happy to help, what was the name of the place? Sentence5: Its the huntingdon marriot. I'd like to book it for 8 people on 2 nights starting on wednesday, and I'll need a reference number. Sentence6: Can you help me look up a particular hotel that I have in mind? Sentence7: Great, thanks for that. I'm also looking for information about a restaurant called mahal of cambridge. Sentence8: Yes please book a table on Wednesday for 8 people at 17:15, I'll need a reference number. Sentence9: It was my pleasure to help. Have a wonderful night. Take care. Bye. Sentence10: Your booking was successful reference number is 1QVLVD25 Question: Who has spoken the sentence 3? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I actually need it for 3 nights Sentence2: Thank you so much that was all I needed. Sentence3: There are 44 in the centre of town. Could we narrow it down to architecture, college, museum, or theater? Sentence4: Sure. Do you have any other criteria? Sentence5: We have alexander bed and breakfast and el shaddai, both are guesthouses any preference? Sentence6: Thanks! I'm also looking for somewhere to stay while I'm in town. Sentence7: Definitely. Did you just want that for one day? Sentence8: What is one of your favorites? I would need the phone number and type of attraction. Sentence9: Your reservation for 2 people at the alexander bed and breakfast this saturday for 4 nights was successful. Your Reference number is : Q0IABNP7 . Sentence10: Great! Thank you for calling the Cambridge TownInfo center. Have a great trip! Sentence11: I actually prefer the cambridge university botanic gardens. They're classed as a park, and their number is 01223336265. Sentence12: I am visiting the centre area and need to find an attraction to visit. Sentence13: Yes, it needs to be in the same area as the attraction, cheap price range, free wifi but doesnt need to have free parking. Do you have anything like that? Sentence14: Alexander Bed and Breakfast sounds nice. Can you make a reservation for two for Saturday? Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]:
Answer: (B) System