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 also need a place to dine Sentence2: sure, i have 5 options for you Sentence3: Yes. Tuesday, 13:00, for 5 people. Sentence4: Okay, you're all set. I have Curry Garden booked for Tuesday, for 5 people, at 13:00. Your reference number is: HW1ZTXBE . Is there anything else I can do? Sentence5: I would like it to be in the expensive price range. Sentence6: What sort of cuisine are you in the mood for? Sentence7: Indian food, in the same area as Clare Hall. Sentence8: We have quite a few indian restaurants in the centre may I book one for you? Sentence9: have a good dinner! Sentence10: choose for me one that is good and get me the entrance fee and address. Sentence11: I recommend Clare Hall. It's free to get in. The address is Herschel Road. Would you like any more information on it? Sentence12: That is all I need. Cheers. Sentence13: what price range do you want? Sentence14: I would to visit a college in the west. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User