Given the task definition, example input & output, solve the new input case.
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
Output: Answer: (A) User
The sentence 1 is said by a user because the intent of it says that the information has to be gathered from the system

New input case for you: Sentence1: I need to find a train going to Stansted Airport and departing on Thursday. Sentence2: I can get my own ticket, thank you. How much will it cost? Sentence3: Thanks I have enjoyed the service Sentence4: The TR7966 is the first train of the day, arriving at 6:08. The latest train arriving before 16:45 would be the TR9427 arriving at 16:08. Would you prefer that? Sentence5: Does that train arrive by 16:45, I need to be there by then. Sentence6: You're welcome. Have a great trip! Sentence7: No, that's all Thanks Sentence8: How much is a ticket? Sentence9: THE CONVERSTION IS ABOUT THE TRAIN TICKET BOOK Sentence10: Alright, how many tickets do you need? Sentence11: Do either of those trains depart from Cambridge? I'd like to leave from there if possible. Sentence12: The fare is 10 pounds 10. May I help you with anything else? Sentence13: TR7966 does depart from Cambridge and arrives at 6:08. The latest train from Cambridge to Stansted airport on Thursday arrives at 10:10. It is train TR6242. Which do you prefer? Sentence14: the train id is TR7966 Sentence15: The 10:10 would work for me! Sentence16: The train ticket will cost you 10.10 pounds. Question: Who has spoken the sentence 13? (A) User (B) System
Output:
Answer: (B) System