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: The car is a white volkswagen. May I help you with anything else? Sentence2: I need to return back to the hotel from the restaurant. Sentence3: Possibly, does this guesthouse hotel offer free parking and free wifi? Sentence4: The Allenbell is located in the East area. Would you like its address? Sentence5: What price range do you have for vegetarian food in the centre area? Sentence6: Yes. We have two restaurants that meet your criteria. Would you like me to book one for you? Sentence7: All right, I have booked you a taxi from the restaurant back to your lodgings. It will be a white volkswagen, and it will arrive to pick you up at 10:00. Is there anything else you need? Sentence8: That could work. Where is Allenbell located? Sentence9: I just need the address for one of the restaurants. Sentence10: You are welcome. Have a great day, goodbye. Sentence11: I'd be happy to help with your request, but first I will need to know what your destination is from the restaurant. Sentence12: Are there any that serve spanish food instead? Preferably in the center area as well. Sentence13: Thank you. The last thing I think I need is a taxi. To pick me up at the restaurant by 10.00? Sentence14: Yes I will also need the contact number for the taxi. Thanks Sentence15: The a and b guest house meets your needs. Would you like to book it? Sentence16: I'm looking for a nice guesthouse to stay at during my trip to Cambridge. Anything with a 4 star rating will do. Sentence17: I am also looking for a cheap restaurant in the area that serves vegetarian food. Sentence18: The address for La Tasca is 14 -16 Bridge Street. Sentence19: How about Allenbell? This meets all your criteria. Sentence20: No, that is all! Thank you very much! Sentence21: There are no results for a vegetarian restaurant in any price range in the centre area. Would you like to broaden your search to another area? Sentence22: What is the car type that will be sent? Sentence23: The contact number is 07800878036. Anything else I can do for you? Sentence24: I'm not finding any cheap vegetarian restaurants. Is there something else you'd like to look for? Question: Who has spoken the sentence 20? (A) User (B) System
Output: 


Answer: (A) User