You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Example: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Example solution: Answer: (A) User
Example explanation: The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

Problem: Sentence1: Hi, I I'm looking for a hotel to stay at that is moderately priced and includes free wifi. Sentence2: Yes. I do need the booking number and would also like to check into a train. Sentence3: Where would you like to depart from? Sentence4: There will be 4 people for 2 nights starting Monday. Sentence5: Is there another hotel that has a room available for 4 people for 2 nights starting on Monday? Sentence6: Your booking request was successful!, Would you like the reference number? Or is there anything else I can help with? Sentence7: If you have no other preferences to help narrow it down, may I suggest the Acorn guest house? It's very nice, with free wifi and free parking as well. Sentence8: I'm sorry, but the hotel isn't available for your stated days. Would you like to try another day or a shorter stay? Sentence9: There are no rooms available for 2 nights starting on Monday. How about a different day or a shorter period? Sentence10: That is perfect. Please book 3 days starting on Sunday. Sentence11: What is the travel time for the train? Sentence12: You said Sunday at first and they you just said Monday. Do you want it for Sunday or Monday? Sentence13: Okay, how about for 1 night? Sentence14: I only need one ticket. Thank you. Sentence15: You're welcome! Have a great day! Sentence16: We have 11 such entries. Does free parking matter to you? Sentence17: Absolutely. How many tickets would you like to get? Sentence18: I am not sure but I do want it to have a 4 star rating. Sentence19: I'd like to go from Broxbourne to Cambridge on Monday. Sentence20: Hi, we have several trains leaving on monday. Is there a particular time of day, you'd like to leave? Sentence21: I have 17 different options. In order to narrow down an option for you, can you tell me what area you would prefer? Sentence22: The train leaves at 13:32 and arrives 14:32 for a travel time of 60 minutes. Is there anything else you need? Sentence23: That's all. Thanks! Goodbye! Sentence24: I would like to leave after 12:30 Sentence25: Yes, please, and can I have a confirmation number as well? Sentence26: Okay and how many guests will be included in the reservation? Sentence27: I have several trains running that day, the earliest I can offer that leaves after 12:30 is TR3108 which leaves at 13:32 and arrives by 14:32, would you like me to book your tickets? Sentence28: Not really, but free parking could be nice. Sentence29: Sorry. Monday is what I want. Sentence30: I have booked your ticket for one, is there anything else you need? Question: Who has spoken the sentence 12? (A) User (B) System
Solution: Answer: (A) User