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'm sorry, there are not Tuscan restaurants at all. Can I find a different cuisine type for you? Sentence2: Yes, please. Same people, date, and time. Sentence3: Okay. That's fine. Can you find me one that serves chinese food? Sentence4: You're welcome, have a lovely day! Sentence5: Hi, I am looking for a restaurant in the south that serves Tuscan food. Sentence6: Lucky star. Sure why not. Sentence7: I was able to book at table at Nandos for the time and date specified. Your reference number is 0W15TQOH . Can I help you with anything else today? Sentence8: No I do not need anything else, thank you goodbye. Sentence9: The only other cheap restaurant in the center of the city is a Portuguese restaurant. Would you like me to book that for you. Sentence10: I have 3 chinese restaurants available. Is there a price range you would prefer? Sentence11: I have the lucky star with is in the south and cheap. Would you like me to book at that restaurant? Sentence12: Could you find me a place with the same price range in the same area? Sentence13: Booking was unsuccessful. Would you like to try another time or different chinese restaurant? Sentence14: I don't care. I just need a table for 5 people at 12:45 on Tuesday if you can book me one. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System