You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

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
Solution: Answer: (A) User
Why? 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: Sentence1: Sure. how many will be traveling? Sentence2: The Cambridge corn exchange is a theatre and the post code is cb23qe. Would you like any more information? Sentence3: No problem! Have a great day. Sentence4: Okay, can you find attractions near the centre? Sentence5: thank you, though there are many choices there isn't a 21:15 so I guess I will take the 21:40 on Friday. Sentence6: It's just me. Can I have the price, travel time, and train ID? Also, do you have any places I can go when I get there? Sentence7: Could you suggest me one? Also let me know of what type of attraction it is and the place's postcode. Sentence8: Thank you, Enjoy the Cambridge Exchange! Sentence9: Wonderful help, thanks Sentence10: Unfortunately no. The earliest that day departs at 21:40. Sentence11: Okay. Can you book that for me please? Sentence12: Is there a train leaving before that? Sentence13: Thanks, I have all I need. Have a nice day. Sentence14: Price is 10.10 pounds, the travel time is 28 minutes, and the train ID is TR4067. I'm sorry, but I don't see any attractions at the Stansted Airport. Sentence15: There are 44 attractions near the center of town. Is there a certain type you're looking for? Sentence16: I'm wondering if there is a train leaving at 21:15 that will take me to the Stansted Airport. Question: Who has spoken the sentence 11? (A) User (B) System
Solution:
Answer: (B) System