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

[EX Q]: Sentence1: No, that's all I needed. Thank you for your help - goodbye! Sentence2: I will take the one that arrives at 15:08. can you make me a booking for 8 people on Wednesday? I will need a reference number. Sentence3: The train should depart from Cambridge on Wednesday and headed for Stansted Airport. It should arrive by 15:15. I would also like you to make a booking for 6 people. Sentence4: I'm looking for a train. Sentence5: I have two trains that would suit you. One arrives at 14:08 and the other at 15:08. Do you have a preference? Sentence6: I have 2,828 trains with different routes, to help narrow it down, where will you be departing/arriving, and what day/time? Sentence7: It was a pleasure to assist you. Please use us again for your future needs. Have a good day. Sentence8: Sure thing! I've booked the train for 8, and your reference number is I62H3VUY . Is there anything else I can do for you today? Question: Who has spoken the sentence 1? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: The area doesn't really matter, can you pick a popular me for me? Sentence2: hmm, what about chinese food? Sentence3: You're all set! It's a grey volvo. If you need to contact the driver for any reason, the contact number is 07174343971. Sentence4: Yes, I'd like to take my husband there at 11:30 on Wednesday. Sentence5: Sure I've found an expensive place named yu garden in the east, would you like me to book something? Sentence6: Thank you, you were a great help. That's all I needed. Sentence7: have great day too Sentence8: welcome and have a great day Sentence9: Booked! The table will be reserved for 15 minutes. Your Reference number: 5R5C75ZP . Sentence10: Would you like me to reserve it for you. Sentence11: Sure. What time would you like to leave? Sentence12: I'd also like to book a taxi from the pool to the restaurant that arrives by the reservation time. Sentence13: Parkside Pools is centrally located and their address is Gonville Place. Is there anything else I can help you with today? Sentence14: i am looking for a swimming pool. Sentence15: I'll be going now. Good-bye Sentence16: As long as it arrives by 11:30 it doesnt matter when it leaves Sentence17: Sure, which part of town are you looking for? Sentence18: I'm looking for a sri lankan restaurant. Sentence19: Yes, please. I'll need the contact number and car type. Sentence20: I'm sorry. I'm not able to find anything that meets your criteria. Would you like to try a different type of food? Question: Who has spoken the sentence 17? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: I am sorry Booking was unsuccessful for that time, can I help you find another place to stay? Sentence2: I would actually like to book rooms for 8 people. Can I do that? Sentence3: Certainly! The Avalon is a 4 star guesthouse in the northend. It offers free wifi. Would you like the phone number or address? Sentence4: This Tuesday, for 5 days. Sentence5: Would you like me to book acorn guest house? Sentence6: I would like to stay in the same price range as the Avalon Sentence7: I guess, can you find me another hotel similar to the Avalon? Sentence8: I am looking for a hotel called Avalon, can you help? Sentence9: There are lots of other guesthouses that are similar, what price would you like to pay? Sentence10: Absolutely! What day do you want to book it for, and for how many days? Question: Who has spoken the sentence 9? (A) User (B) System
[EX A]:
Answer: (B) System