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: What is the train id of the one arriving closest to 13:00? Sentence2: Only me so so just one Sentence3: The address for the midsummer house restaurant is Midsummer Common, the post code is cb41ha and their phone number is 01223369299. Would you like me to book a reservation? Sentence4: I have you booked on TR5170 with reference number KH6HKQ4X . Unfortunately, I have no Vietnamese restaurants in the centre. Would you like to try another type of food or area? Sentence5: Well, that depends on where you're going and the day you're traveling. Do you have that information? Sentence6: TR5170 is arriving by 11:51, that is the closest time to 13:00 that is showing available. Would you like to book a ticket? Sentence7: So happy I could help you today. Thank you for using the Cambridge Towninfo centre. Have a great day! Sentence8: What trains will leave from cambrige and arrive by 13:00? Sentence9: There are four trains that meet those criteria. They leave at 5, 7, 9, and 11 and arrive 51 minutes after departure. Would you like me to book one for you? Sentence10: In British restaurants you have three choices: Fitzbillies, the Midsummer House, and the Cambridge Chop House. Sentence11: Ok, how about an expensive british restaurant? Sentence12: I need to get your London Kings Cross on Saturday. Sentence13: Yes. I am also looking for a Vietnamese restaurant in the centre Sentence14: How many will be traveling? Sentence15: Could you please send me the address, postcode and phone for the Midsummer House? Sentence16: No, thank you. I can book it later. I think thats all I need for today. Thanks. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User