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: Certainly, at what time? And how many will be in your party? Sentence2: I have the caffee uno located in the centre. Sentence3: I am looking for a place to stay Sentence4: I also need a restaurant that serves venetian food, in the expensive range. Sentence5: Sounds good. Can you book for Wednesday for 1 person, 4 nights? Sentence6: Thank you for using the Cambridge TownInfo centre. Have a great day. Sentence7: There are are lots of options. Is there a particular side of town you would like to stay in? Sentence8: I'm looking for something moderately priced in the west. Sentence9: Are they 4 star rated by chance? Sentence10: Awesome. Now please book me a taxi to the restaurant. Just please make sure I get their in time for my reservation Sentence11: Thank you so much for all your help. Have a great day. Sentence12: The booking was successful, your reference number is N7L47L69 . Sentence13: Your taxi has been booked. It will be a white Volvo and their contact number is 07236170295. Sentence14: I am sorry I have no listings for any with 4 stars. Sentence15: That's okay. Can you look for one that is expensive? Sentence16: Please to book a taxi I need departure location, arival location and travel time. Please provide that information. Sentence17: Great! I would like a reservation for Wednesday. Sentence18: Table for 1 at Caffe Uno is confirmed for Wednesday at 18:15. They will hold your table until 15 minutes after your reservation time. Your confirmation number is A3L9KQ34 . Sentence19: the huntingdon marriot hotel is great! Sentence20: I will be leaving the restaurant. Sentence21: I'm sorry, I can't find any restaurants matching your request. Would you like to try for a different type of cuisine perhaps? Sentence22: The same group of people discussed at 18:15 the same day. Sentence23: OK, then please try Italian restaurants. Sentence24: In order to book a taxi I need the travel time, departure location and the arrival location. Sentence25: Yes, I will be leaving from the hotel. I will need to arrive at the restaurant by 18:15 on Wednesday. Sentence26: Hobsons House is exactly what you're looking for. Would you like me to book it for you? Question: Who has spoken the sentence 19? (A) User (B) System
Output: 


Answer: (B) System