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

[Q]: Sentence1: Enjoy your travels! Let us know if we can be of any further assistance. Sentence2: TR8143 departs at 14:11 and arrives in Cambridge by 14:58, does this suit your needs? Sentence3: I need a train leaving from kings lynn. Sentence4: Yes, I'd like to travel on Wednesday, and I'd like to arrive in Cambridge no later than 15:30. Sentence5: There are no nightclubs in the west. Would you like to try another area? Sentence6: There are 133 trains leaving Kings Lynn, do you have a particular day you are traveling? Sentence7: They have free entrance. Their postcode is cb30ds. Sentence8: Could you look up a college instead then? Sentence9: I'm glad I could help. Sentence10: Churchill college is located in the west part of town. Sentence11: Yes it does. Can you verify the total travel time and price? Sentence12: Thank you goodbye. Sentence13: Thanks a lot, that's all. Sentence14: Sure - the travel time is 47 minutes, and the fee is 9.80GBP per ticket. Sentence15: I also need a nightclub in the west. Sentence16: Could you get me the postcode and entrance fee for there? Question: Who has spoken the sentence 9? (A) User (B) System
[A]: Answer: (B) System

[Q]: Sentence1: How about the Ashley Hotel? It is on the north side of town, has 2 stars, free wifi and parking, and is moderately priced. Sentence2: Is that a 2 star hotel? Sentence3: Are there any available for less than $200 a night? Sentence4: Unfortunately, the rooms are unavailable for that day and time. Can I try a shorter stay for you or possibly a different day? Sentence5: Of course! The reference number is QZYSOMAW and the address is 74 chesterton road. May I help with anything else? Sentence6: No, it has 4 stars Sentence7: Can you make a reservation for 6 people for 3 nights starting on Wednesday. Sentence8: Yes, I was able to successfully book you for two nights. Is there anything else you need? Sentence9: The only 2 star hotels are in the north or the east. Do you mind staying in one of those areas? Sentence10: Nope, that's all I need. Thanks for your help! Sentence11: Can I have the reference number and address please? Sentence12: How about for 2 nights? Sentence13: We're glad to be of service, and please do not hesitate to contact us if you need more help while you're in Cambridge! Sentence14: Yes that would be fine with me Sentence15: There are several. Alexander Bed and Breakfast is cheap and is in the Centre. Would you like me to book that? Sentence16: Let's try a hotel type with free parking in the centre of town with a star of 2. Sentence17: Are there any rooms available in hotels with free parking? Sentence18: how about for 2 nights? Sentence19: Yes. Do you have a preference for the hotel's area or price range? Sentence20: I'm sorry. I have no 2 star hotels in the center of town. However, I have some in other parts of town. Would you care to modify your search criteria? Question: Who has spoken the sentence 10? (A) User (B) System
[A]: Answer: (A) User

[Q]: Sentence1: It has 2 stars. May I help you with anything else? Sentence2: Yes, I'd like to book a table for 7 for Sunday at 14:45. Sentence3: Thank you for using our system! Sentence4: Your car from the Ashley Hotel to Graffiti is booked.The car type is a Black Volkswagen and the contact number is 07898395762. Is there something else I can assist with? Sentence5: When would you like to leave? Sentence6: Great thank you so much that's all I needed today. Sentence7: I've booked your reservation at Graffiti for Sunday 18/06/2017 for 7 people. Reference number 3GQ3ITLZ . Sentence8: It is on Hotel Felix Whitehouse Lane Huntingdon Road. Would you like me to book it? Sentence9: Where do you want to be picked up? Sentence10: I just need to get to the restaurant by the time the reservation starts. Sentence11: Certainly. Where are you departing from and where are you going? I also need the time you are leaving or need to arrive. Sentence12: No, not really. It just needs to be a hotel. Sentence13: Excellent. I'm also looking for a place to stay. It should have free parking and free wifi. Sentence14: How about the Ashley Hotel? It is on the North side of town and has free wifi and free parking. Sentence15: Hello. I'm trying to find a restaurant called Graffiti. Can you help me locate it? Sentence16: Please have the taxi pick me up at the hotel. Can I get the taxi contact number and car type? Sentence17: That sounds like it might be great - how many stars does the Ashley have? Sentence18: An hour after I arrive at the restaurant sounds about right. Sentence19: I can help with that. Is there a particular area that you would prefer to stay in? Sentence20: I also need a taxi to take me somewhere. Question: Who has spoken the sentence 10? (A) User (B) System
[A]:
Answer: (A) User