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: What day would you like to travel on? Sentence2: I also need a train to Cambridge departing from Stevenage. Sentence3: Italian would be great. I also need a train to Cambridge that arrives on Tuesday by 15:30. Sentence4: Reference number is IAYFJ8SI, that will be all Sentence5: Absolutely, there are quite a few restaurants. Can you help me by specifying what type of food you're looking for? Sentence6: Ok, I've booked your party on TR0517, it leaves at 11:54. Reference number is IAYFJ8SI . Total is 102.4 GBP payable at the station. Anything else I can do? Sentence7: Anytime would be great, I'd like to book it for the same number of people as my restaurant. Sentence8: I am interested in an expensive restaurant. See what's available, and maybe I can choose from there. Sentence9: I'll be traveling Tuesday, and need it booked for 8. Could I also get the reference number for that as well? Sentence10: any expensive restaurant will suffice. Reserve it for 8 people at 18:30 on tuesday and I'll need the reservation number please. Sentence11: Booking was successful. The table will be reserved for 15 minutes. Reference number is : 51VEERAC . Sentence12: Could you help me locate a restaurant in the east area of town? Sentence13: Great! Have a great day! Sentence14: The first train leaves Stevenage at 05:54 and every two hours thereafter until the last train at 23:54. What time would you like to leave or arrive? Sentence15: I have five places, what type would you prefer? Sentence16: There are no Italian places to dine, is there another food you would prefer before we book the train? Question: Who has spoken the sentence 1? (A) User (B) System
Answer:
Answer: (B) System