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

[EX Q]: Sentence1: Yes, that sounds like a good choice. Can you book it for me for 3 people starting Saturday? Thanks Sentence2: I was able to book the hotel for you. The reference number is BTTS9GYC . Is there anything else I can help you with today? Sentence3: There are eight accomodations of the hotel type with free parking. What part of town do you prefer? Sentence4: I need a train from norwich to get to the hotel by 16:30. Sentence5: The Cambridge Belfry is an inexpensive, 4 star option on the west side with free wifi and free parking. Sentence6: The west, please. And can I get free wifi? Sentence7: Okay I have a train tat gets to Cambridge at 15:35. Would you like me to book that for you? Sentence8: It doesn't really matter, just need to get there by 16:30. Sentence9: I want a place to stay. Find me a hotel that includes free parking. Sentence10: I have several available. When do you want to leave? Sentence11: I would like to stay for 3 nights. Sentence12: Sure, I can do that. How many nights would you like it for? Question: Who has spoken the sentence 6? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: Right, Saturday, did you have a time you want to leave by? The trains leave every 30 minutes starting at 5:19 Sentence2: No I think that will be it, thank you for your help! Sentence3: Your booking was successful. Reference number is PR8JE3DU and total is 39.59 GBP. Can I help you with anything else today? Sentence4: Saturday from Peterborough to Cambridge for 3 people. I will need the reference number too please. Sentence5: It doesn't matter when I leave, as long as I arrive by 12:45. Sentence6: I wish to arrive before 12:45. Sentence7: There are 38 trains from Peterborough to Cambridge on Saturday, all throughout the day. Can narrow down the time of day you wish to travel? Sentence8: Yes, for the same group of 3 people from before. Sentence9: I am looking for moderately-priced three-star guesthouse in Cambridge. Sentence10: There are four guesthouses that meet your criteria. Do you need internet or parking? Sentence11: I have booked your stay at the alpha-milton guest house. The reference number is HS3MWJ10 Sentence12: I have located one hotel matching your search criteria, the Alpha-Milton Guest House. The phone number is 01223311625. Would you like to make a reservation? Sentence13: Sure. I will need to know how many people you would like to book it for, what day you would like and how many days you would like to stay. Sentence14: TR5538 leaves at 11:48 and will arrive by 12:38. Would you like for me to book this train for you? Sentence15: I'll need the reservation for 3 people starting Saturday for 4 nights. Sentence16: I would like to call them myself please. Thank you. Sentence17: Thank you, I will also need a train from Peterborough to Cambridge on Saturday. Is there anything available? Sentence18: Sure. Is there anything else I can help you with today? Sentence19: Yes please. Can I actually have you book them? I need the reference number as well. Sentence20: There are 14 trains arriving by that time. When would you like to leave? Sentence21: You're welcome. Enjoy your time in Cambridge! Sentence22: It doesn't need to have free parking and I don't care about the internet. Which guesthouse can accommodate for 3 people? Question: Who has spoken the sentence 13? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: There are three expensive European restaurants in the Centre area. Would you like to know the name and address of each location? Sentence2: Absolutely. Your reference number is FXDNF0IU . What else can I help you with? Sentence3: Can I have the reference number please? Sentence4: I would like the hotel for two nights, starting on Thursday. Sentence5: Hi! Are there any European restaurants in the center of town? Sentence6: Yes, there are 8 results for European restaurants in town centre, what price range are you looking for? Sentence7: Very, very insanely expensive, money is no object. Sentence8: Yes, I need a hotel for 4 people with free parking in the expensive price range, for 2 nights Sentence9: You are booked at the Gonville Hotel your reference number is LIA4E1ME . Can I help you with anything else? Sentence10: If you need anything else, please contact us with your needs. Sentence11: Thank you for using our service. Have a great night. Goodbye. Sentence12: Success! We've booked your reservation Sentence13: Yes thank you Sentence14: No, that is all. Thank you so much for the assistance. Sentence15: Eraina is at Free School Lane CIty Centre, phone #01223368786. Would you like me to make a reservation? Sentence16: Yes, I need a reservation on Thursday at 16:30 for 4 people. Sentence17: That is all. Thanks so much for your help! Sentence18: And what day would you like the reservation for? Sentence19: A hotel and should include free parking, in the expensive price range,for same group for 2 nights Sentence20: Is there anything else I can help you with? Question: Who has spoken the sentence 17? (A) User (B) System
[EX A]:
Answer: (B) System