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

Positive Example 1 -
Input: 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

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: I just booked that for you. Your reference number is 1G6KIGNS . Can I help you with anything else? Sentence2: I feel like trying Chinese today, find me a cheap place that serves it please Sentence3: Oh yes, we have three in the city centre. How about the Golden House? It's on Lensfield Road and meets your needs. Sentence4: I'll be departing Cambridge and would like to arrive in Peterborough by 19:15. Can you find a train that would get me there close to that time? Sentence5: Yes, I'll also need a train. I'm heading to Peterborough on Friday. Sentence6: The Golden House fits your needs. Would you like to book a table? Sentence7: Okay! It's a 50-minute train ride, and it costs 16.50 Pounds. Can I help you with anything else? Sentence8: I don't need to book right now. You've told me the departure time. I just need the travel time and the ticket price. Sentence9: You're welcome! Bye now! Sentence10: Which one do you suggest? Sentence11: Actually, I will need a restaurant in the centre. Do you have any? Sentence12: The lucky star is perfect for you. It's located at Cambridge Leisure Park Clifton Way Cherry Hinton. Do you need to book a table? Sentence13: We have four! 3 in centre and one south. Which area are you going to be in? Sentence14: The last train of the day will work for you. It departs at 18:06, and arrives at 18:56. Would you like to book it? Sentence15: Yes 7 people for thursday at 12:15, and can I get the reference number? Sentence16: I will be in the south. Sentence17: No, that is all for today. Thanks so much. Bye. Sentence18: I have many departures that leave for peterborough on Friday.What time would you like to leave? Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User