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

Sentence1: Booking was successful for the bridge guest house. Your Reference number is : LBEOV690 . Sentence2: Yes please. Which is the cheapest? Sentence3: Thank you. Have a nice day. Sentence4: No. I would like to make a reservation for Wednesday for 3 nights and 8 people. I will also require a reference number. Sentence5: I was unable to book your stay at any of the three hotels. Would you like to change the length of your stay or change the day? Sentence6: There are 2 hotels with a 3 star rating and free parking. Would you like to stay in the centre or south? Sentence7: Sorry, I was mistaken. There are 3 guesthouses matching your request. One each in the south, north, and west. Would you like to book one? Sentence8: Thank you. Have a nice day. Sentence9: Can you please try a 2 day stay. Sentence10: I can only tell you they are all in the moderate price range. Do you have any other preferences? Sentence11: I am looking for a hotel with a 3 star rating and free parking Sentence12: Either is fine. I'd like a guesthouse. Question: Who has spoken the sentence 5? (A) User (B) System
Answer: (B) System

Sentence1: You're welcome, have a great day. Sentence2: I would like modern european food and in should be located in the centre of town. Sentence3: I would like a train that leaves from stansted airport after 16:15 Sentence4: I'd like a cheap one, I don't want to spend too much on food, I want to bring back as many knick-knacks as possible. Sentence5: Please get me their postcode instead Sentence6: How many tickets do you need me to book for the train? Sentence7: I actually don't need a ticket right now. Could you please tell me the price and travel time though? Sentence8: There are 8 results for European restaurants in the centre area, would you prefer an expensive, moderate or cheap price range? Sentence9: Yes, the postcode is cb58aq. Sentence10: The river bar steakhouse and grill meets all your needs. Do you want me to book? If yes, for how many, what day and what time? Sentence11: Absolutely. The TR5365 costs 10.10 pounds and has a travel time of 28 minutes. What else can I do for you? Sentence12: There's a train leaving stansted airport for cambridge every hour on Monday, by what time would you like to arrive? Sentence13: I will be traveling on monday and need to go to cambridge Sentence14: The earliest train is TR5365 that leaves the airport at 16:24 and arrive in Cambridge at 16:52. Do you need a ticket? Sentence15: Thank you, that will be all. Sentence16: I don't care. Give me the earliest one leaving after 16:15. Sentence17: What are would you like to eat? Sentence18: Yes please thank you. Can you also assist to find me a restaurant where i can dine in the Center. My preference is Modern European food. Sentence19: I also need a place to eat. Sentence20: What day will you be traveling, and where will you be heading to? Question: Who has spoken the sentence 6? (A) User (B) System
Answer: (A) User

Sentence1: Absolutely. Anything else I can assist you with? Sentence2: I'm looking for lodgings on the east side, in the expensive price range. Sentence3: Can you make a reservation for Monday at 19:30 for 8 people? Sentence4: Yes, how many people and what day would you like to book? Sentence5: it doesn't need a free parking. Can you book a room for me? Sentence6: I just need to know the how many stars it has, the phone number there, and if they have WiFi. Sentence7: Unfortunately I can't get that booking for you. Is there anything else I can do for you? Sentence8: Yes, we have thanh binh on the West side. Would you like a reservation? Sentence9: Yes I will book it for you and get a reference number ? Sentence10: I am sorry for the delay. Also, there are no Venetian restaurants. Did you want a Vietnamese restaurant instead? Sentence11: I am also trying to find a Venetian restaurant. Are there any in town? Sentence12: Um I think you're getting ahead of yourself? I'm still waiting on that reference number for the booking you said you'd complete.... Sentence13: Is there anything else I may help you with today? Sentence14: The Express by Holiday Inn is located at 15-17 Norman Way int he Coldhams Business Park which is located in the east. Sentence15: Please book it for me. Sentence16: Sure, it has two stars, includes wifi, and the phone number is 01223866800. Can I help you with any thing else today? Sentence17: I do not need to book. Sentence18: Oh...alright...well I guess not then. You weren't very helpful but whatever bye Question: Who has spoken the sentence 15? (A) User (B) System
Answer: (B) System