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 is none that match your request in the west. Should I try different star rating or another part of town? Sentence2: I'd like something on the north side of town. Sentence3: Yes please book it for 6 on tuesday and I will be staying 5 nights if that's available. Sentence4: I've found 24 different guesthouses for you. Would you like some recommendations based on more preferences? Sentence5: Yes. Would you check the west part of town please? Sentence6: I have the Hamilton Lodge on chesterton road, would that be ok? Sentence7: Hi, I need a guest house to stay in, please. Sentence8: That would be fine as long as it is in the same price range Sentence9: You're welcome. Enjoy your stay. Sentence10: There are no guest house's available in the north. How about a hotel instead? Sentence11: I found 3 guesthouses matching your criteria in the north, south, and west . What part of town would you prefer? Sentence12: Could you try a hotel in the west in the same price range. The star does not matter. Sentence13: I need free wifi and it should have a star rating of 3 please. Sentence14: Hobsons House is a moderately-priced, 3-star guesthouse in the west. I was able to book that for you, ref#LQIVXPCX . Can I help with anything else today? Sentence15: I am sorry there are no hotels that match either. Would you like to try a different part of town or star rating? Sentence16: Thank you, that's all I need today. Goodbye! Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User