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: Great thank you very much Sentence2: How about el shaddai? It has free parking and wifi and is in the centre of town. Sentence3: You're welcome. Is there anything else I can help you with? Sentence4: Thanks I have everything I need. Goodbye! Sentence5: The contact number is 07263703306. Can I provide any further assistance today? Sentence6: Taxi booking completed! Your car is a Grey Audi, their contact number is 07263703306. Sentence7: There a 5 places in the centre. Do you have a preferred price range? Sentence8: Is there a food type you have a preference for? Spanish, Italian, Chinese, Indian are just some of the choices. Sentence9: I don't need a booking, but I need a taxi commuting between that hotel and the booked restaurant. Sentence10: Great. Thank you for contacting the Cambridge Towninfo Centre Sentence11: I'd like to book a table for 1 at 14:45 on monday, please. I also need the reference number. Sentence12: I have booked the restaurant for you. The table will be reserved for 15 minutes. The reference number is Y3MGYYH6 . Sentence13: I also need a hotel that is near the restaurant. Sentence14: Just the telephone number of the taxi please. Sentence15: Okay, I've got the dojo noddle bar in the centre of town that serves cheap food. How will that be? Sentence16: I would like to eat at cheap restaurant in the centre while I am here in Cambridge. Sentence17: That sounds good. What is it's star rating, please? Sentence18: No, I don't really care what kind of food it is as long as it's cheap. I will need a reservation for 1 person at 14:45 on Monday. Sentence19: No price range. I do need it to have free wifi and parking though. Can you tell me what star that hotel would be? Sentence20: Will the taxi arrive by the booked time? Sentence21: Yes, your taxi will arrive by the booked time of 14:45. Is there anything else I can help you with today? Sentence22: The star rating is 0. Would you still like me to book this hotel for you? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System