Detailed Instructions: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
See one example below:
Problem: 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
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: I am wondering if you have any restaurants in town that serve eriterean food. Sentence2: Sure I can help you. What kind of information were you looking for? Sentence3: Yes, there are three restaurants that serves Mediterranean food. Sentence4: I have booked two seats on TR3888 arriving in Cambridge at 08:23. Reference number is : 5DPBKIY1 . Can I be of further assistance? Sentence5: Okay! From where? Sentence6: I am looking for information in Cambridge. Sentence7: What time does it arrive? Sentence8: Monday. As I said before, 2 tickets for Monday. Sentence9: it will arrive by 08:23. is that fine with you? Sentence10: excellent, have a great day! Sentence11: Monday and I'll need to arrive by 08:30 in Cambridge. Sentence12: Yes please do. Sentence13: I also need help finding a train going to Cambridge Sentence14: Great, what day and time do you prefer? Sentence15: The first train leaves at 5:40. Sentence16: Umm, actually I had asked about Eriterean food, not Mediterranean. Sentence17: Booking was successful. The table will be reserved for 15 minutes. Reference number is : K8YAC7SK . Can I help with anything else? Sentence18: I like the gardenia. Need me to make a reservation? Sentence19: I need to leave from birmingham new street Sentence20: what day will you be travavelling Sentence21: we got none that serves that kind of food. will you change the kind of food? Sentence22: Okay I have three restaurants serving this. Would you like me to choose one for you? Sentence23: Yes for 2 people on monday at 12:15 please. Sentence24: Yes that will work. I need 2 tickets for monday please. Sentence25: No, that will be all for today. Sentence26: No, I really want Mediterranean food. Question: Who has spoken the sentence 21? (A) User (B) System
Solution:
Answer: (B) System