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

Let me give you an 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
The answer to this example can be: Answer: (A) User
Here is 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

OK. solve this:
Sentence1: It departs at 15:17, and is a 51-minute ride. Can I help you with anything else? Sentence2: What's the travel time on that train? Sentence3: Thanks! I also need a train arriving at 17:15 on Monday. Sentence4: What time does it depart? Sentence5: That will be all. Thank you. Sentence6: No, that is all for now. Thanks. Sentence7: I'm departing from Longon Kings Cross. Sentence8: No. I just need to know the departure time and how long it takes. Sentence9: Can you recommend a Polish restaurant instead? Sentence10: Unfortunately, we no longer have any Polish restaurants in town. The only one we had closed last month. Can I find something else for you? Sentence11: The travel time is 51 minutes. Sentence12: Where you be departing from? Sentence13: How about one with gastropub food? Sentence14: Sure. I don't have their telephone number but their address is 34 - 35 Green Street. Sentence15: There are two options - the backstreet bistro and the slug and lettuce. Do either of those sound good to you? Sentence16: Yes can you give me the address and phone number of the slug and lettuce? Sentence17: The train departs from london kings cross at 15:17. Do you want me to book the train for you? Sentence18: There is a train that arrives at 16:08. Would you like to book it? Sentence19: 51 minutes is the length of the ride, anything else today? Sentence20: You're welcome, have a great day. Sentence21: well then may I suggest kymmoy, they serve asian oriental and that's where I go to dine Sentence22: Where in the centre can I dine? I want something expensive. Question: Who has spoken the sentence 17? (A) User (B) System
Answer:
Answer: (B) System