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 would like to book it for Thursday for 8 people for 13:45. Sentence2: No, it should be in the moderate price range and include free wiki, though. Sentence3: Can I help with anything else today? Sentence4: Yes, can you book for 8 people, 3 nights, starting on thursday. Sentence5: what about the one on the cheap range? Sentence6: Nope, that's it, thanks! Sentence7: Yes I have two options for you. Would you like to book one of these? Sentence8: I'm visiting cambridge and I need a place to stay. I'm looking for a 0 star guesthouse. Sentence9: thanks i'm also looking for a restaurant. Sentence10: Thank you so much! Sentence11: Booking was successful. The table will be reserved for 15 minutes. Reference number is : KUWF73DZ . Sentence12: What day would you like to book that for? Sentence13: I'd be happy to help you. What kind of cuisine are you wanting to try? Sentence14: I'm so sorry but we don't have anything that exactly matches that. Since you want a 0 star how about a cheap guesthouse called el shaddai in the centre? Sentence15: Glad I was able to help you. Have a good day. Sentence16: I have made a booking for you for city centre north b and b. Your reference number is K9NGVLIT . Sentence17: I have two options. One in the north and one in the center. Do you have a preference? Sentence18: i am actually looking to book a restaurant called riverside brasserie. Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User