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

[EX Q]: Sentence1: kohinoor. i want to book a table for 2 people at 16:45 on Thursday Sentence2: Nope, I'm all finished for today. Thanks so much, goodbye now! Sentence3: Sure. Booking was successful. The table will be reserved for 15 minutes. Reference number is : X9AVZ8EI . Can I help with anything else today? Sentence4: Absolutely. What is the name of the restaraunt you are interested in? Sentence5: You are very welcome, bye! Sentence6: I need to find some information in a particular restaurant. Are you able to look up a specific place? Sentence7: I also need a Thursday train. Sentence8: Depart from Ely and would like to arrive by 13:00 in Cambridge. I need to book it for 2 people I also need a reference number. Thanks Sentence9: What location will you depart from and where are you headed? Sentence10: Sure thing, it's booked and your reference number is PWSVK4XQ . Do you need more help? Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]: Answer: (A) User

[EX 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
[EX A]: Answer: (A) User

[EX Q]: Sentence1: I am so sorry but the da vinci pizzeria is fully booked and I was unsuccessful. Do you want me to try another restaurant? Sentence2: Okay I was able to book you into The Royal Spice serving Indian food and your reference number is K8N0LLBP . Sentence3: Yes how about one in the same area and price range please? Sentence4: I found Da Vinci Pizzeria is a cheap restaurant in the north. Would you like me to make a reservation? Sentence5: I have you scheduled for a reservation for 1 on Sunday at 12:30, would you like a confirmation receipt? Sentence6: Yes please. For one person at 12:30 on Sunday. Sentence7: Thank you for using this service. Goodbye. Sentence8: Awesome! Thanks so much. That is all I need. Sentence9: I want to find some information on da vinci pizzeria Sentence10: Yes, please give me the reference number. Question: Who has spoken the sentence 5? (A) User (B) System
[EX A]:
Answer: (B) System