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

[EX Q]: Sentence1: That will work. What is the price and arrival time for that? Sentence2: Where would you like to travel from and to? Sentence3: Sure, I have 7 trains that would work. The closest to your requested time is the TR5110 that leaves at 20:34. Sentence4: That will cost you 16.50 pounds and you will arrive by 21:24. Sentence5: Certainly. Home from Home is a guesthouse on the north end of the city. It offers free internet and parking and is moderately priced. Would you like to book a room? Sentence6: The train should depart from cambridge and travel to peterborough. Sentence7: You too. Goodbye. Sentence8: I would like to book a train that is running on Tuesday and departs anytime after 20:15, can you help me with that? Sentence9: Thank you have a nice day. Sentence10: Your booking was successfull! Reference number is I5VKNKJ3 Sentence11: That is great. I also want to know about a hotel called home from home. Can you find it for me. Sentence12: Yes. I would like to book for 8 people for 3 nights starting from Saturday. Question: Who has spoken the sentence 9? (A) User (B) System
[EX A]: Answer: (B) System

[EX Q]: Sentence1: They are all moderately priced, but Avalon has free internet and four stars. Would that suit you? Sentence2: Yes, free wifi. No free parking though. Sentence3: That sounds good. Do they have wifi? Sentence4: Your table has been booked. The reference number is 3FOO64PM . Sentence5: Thank you I am also looking for a restaurant in the same area as the hotel serving expensive chinese food. Sentence6: please contact us again in the future. goodbye. Sentence7: There is Hakka located at Milton Road Chesterton would you like me to reserve it for you? Sentence8: I have three guesthouses to choose from. Do you mind they are in the north? Sentence9: I'm looking for a guesthouse to stay in and I don't need a free parking. Sentence10: 01223315702 and cb12dp. Sentence11: Perfect thats all I needed! Sentence12: This one is in the north a and b guest house Sentence13: Are there any moderately priced 3 star guesthouses in the west available? If not in the west, what about the north? Sentence14: Yes please. I need it for 8 people on Wednesday at 19:15. Sentence15: That's fine. Could I get their postcode and phone number? Sentence16: No that is okay, can you book the cheapest one for me please? Question: Who has spoken the sentence 2? (A) User (B) System
[EX A]: Answer: (A) User

[EX Q]: Sentence1: I'm sorry, the book was unsuccessful. Would you like to try for another date or a shorter stay? Sentence2: Okay, when would you like to leave or arrive by? Sentence3: How about for only a one night stay? Sentence4: I am looking fro something cheap with a 0 star rating. Sentence5: I would also like to know about fun things to do in town. What types of entertainment is available near the hotel? Sentence6: Great! I have a yellow honda set to pick you up. The contact number is 07441052837 Sentence7: Cityroomz will be fine. I need a room for 2 nights starting Thursday. There will be a total of 8 guests. Sentence8: Thank you! What is the reference number? Sentence9: There are no cheap hotels with 0 stars in the centre. Would you like to book cityroomz? It is a hotel that has 0 stars and it is moderately priced. Sentence10: Sadly I couldn't book Cityroomz. But I was able to book Alexander Bed and Breakfast a 4 star guesthouse for an even cheaper rate for one night with 8 guests. Sentence11: Glad to be of service! Sentence12: Thank you! That's all I need today. You've been very helpful. Sentence13: There is no entertainment in the centre would you like to look for another type of attraction? Sentence14: I want to leave my hotel no later than 17:15. Sentence15: I need a place to stay in the centre of cambridge. Sentence16: do you have any constraints regarding cost or quality? Sentence17: In that case can you tell me the address of some of the colleges in the area? Sentence18: Can you give me the full address for Downing College please? Sentence19: No thanks, but I'd like to book a taxi between the two locations, please. Sentence20: I would like to book a hotel. Sentence21: Downing College is on Regent Street with the postal code cb21dq. Would you like the phone number? Sentence22: How does El Shaddai sound? It is a cheap guesthouse with 0 stars located centrally. It includes both free wifi and free parking? Sentence23: We have Gonville and Caius College on Trinity Street, Emmanuel College on Saint Andrew's Street, and Downing College on Regent Street. Sentence24: Your reference number is 6MYWN42P . Question: Who has spoken the sentence 4? (A) User (B) System
[EX A]:
Answer: (A) User