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

[Q]: Sentence1: Thanks! I'm all set now. Bye! Sentence2: i am looking for a place to stay. The hotel should have a star of 4 and should include free wifi. Sentence3: I have several, when is your stay? Sentence4: A white bmw is booked for you. The contact number is 07793421858 Sentence5: There are 21 options. What type of food do you like? Our restaurants are quite diverse. Sentence6: a and b guest house is very nice Sentence7: Okay, now I would like to find a restaurant in the centre that is also in the moderate price range Sentence8: Yes it is in the moderate price range, what help can I help with? Sentence9: Ah, it was just a temporary lapse, it is back up now. I have you booked. The reference number is K9PYGG5A . Sentence10: Booking was successful. Reference number is : ZCRPOLK8 . anything else? Sentence11: Yes! What do you mean it's down? I need a place to eat! Sentence12: Choose one and surprise me. And book it for 6 people on thursday at 13:15. I'll need the reference number Sentence13: I'll need it to pick me up from the hotel and arrive at the restaurant at least 10 min before our reservation? Sentence14: You are welcome and good bye Sentence15: What is the name of the restaurant you booked the reservation at? We will also need a taxi to get there from the guesthouse. Sentence16: It was restaurant one seven, what time would you like that taxi? Sentence17: Can you confirm a and b guest house is in the moderate price range, please? Sentence18: It appears our booking system is down. Is there anything else I can do for you? Sentence19: book for 6 people and three nights starting on thursday. Sentence20: Do you have one that is a guesthouse? Question: Who has spoken the sentence 4? (A) User (B) System
[A]: Answer: (A) User


[Q]: Sentence1: Thank you goodbye. Sentence2: the cow pizza kitchen and bar is a moderately priced gastropub in the centre of town. It's located on Corn Exchange Street, and the phone number is 01223 308871. Sentence3: Can I have the address and phone number of a gastropub in the centre of town? Sentence4: There are three gastropub restaurants listed. One is in the east part of town and the rest are in the centre. Sentence5: I would like the address and phone number of the one in the east part of town. Sentence6: A moderate priced irish food restaurant. Sentence7: thank you and good bye Sentence8: there are no irish restaurants. Would you like to choose another type of food? Sentence9: I'm sorry, it appears there are no results for the east part of town. Our system is having difficulty of some sort. Sentence10: Yes, could you please check whether there is a gastropub? Question: Who has spoken the sentence 7? (A) User (B) System
[A]: Answer: (B) System


[Q]: Sentence1: What area is that in? Sentence2: 08715501010 Can I help you with anything else? Sentence3: You can reach them on 01223400170 Sentence4: Not right now, but could you give me their phone number and postcode? Sentence5: What is their phone number? Sentence6: it is in the south area. Sentence7: Can you also help me book a taxi Sentence8: I'd love to. The address is 2G Cambridge Leisure Park Cherry Hinton Road Cherry Hinton, and the postcode is cb17dy. Sentence9: that's all i need thanks Sentence10: I am excited to be coming and would love to find an expensive mexican restaurant. Sentence11: What about something for entertainment? Sentence12: How many passengers will there be? Sentence13: Then you want chiquito restaurant bar on the southend! Would you like me to book you a table? Sentence14: Are there any architectural attractions near there? Sentence15: Could I get a phone number for the restaurant please? Sentence16: There are no architecture attractions in the south. Sentence17: Certainly, were would you like the taxi from? Sentence18: It will just be me, so one. Sentence19: I want to leave the Tenpin by 17:15 to go to the Chiquito restaurant. Sentence20: You are booked for a grey Toyota. The taxi contact number is 07123501809. Do you need help with anything else? Sentence21: Sure, most people love Tenpin, located at Cambridge Leisure Park, Clifton Way, postcode cb17d. Sentence22: Glad I could help, have a good day. Question: Who has spoken the sentence 11? (A) User (B) System
[A]:
Answer: (B) System