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: Thank you for the information. Sentence2: In that case may I suggest the Acorn Guest House? It's located in the north and has a moderate price range with a four star rating. Sentence3: The man on the moon is the only concerthall, but it is in the the centre, would you like more info on that or for me to run another sarch? Sentence4: Are there any 5 star hotels in that area? Sentence5: Do they have internet? Sentence6: There are no 5 Star Guest Houses in the area. Do you have any other preferences? Sentence7: Okay, let's try a 4 star rating instead. Do you have any guesthouses listed with a 4 star rating? Sentence8: I don't care about the location or price. Sentence9: What is the price range and area? Sentence10: what is its entrance fee? Sentence11: Ok! Have a great day! Sentence12: Do you have any preferences on things to do or area? Sentence13: yes, there are 18 guesthouses with 4 star ratings. Sentence14: We don't have information on the entrance fee, but their number is 01223474144 if you would like to contact them. Sentence15: No thanks but I'm looking for something to do around town Sentence16: I am looking for a five star guesthouse to stay in. Sentence17: Can I look up anything else for you? Sentence18: Yes, they offer both parking and internet. Would you like to make a booking? Sentence19: They are located all across town, from all price ranges. Do you have any preferences? Sentence20: I am not finding any 5 star hotels. Would you like to try a different rating? Sentence21: That is all I needed. Sentence22: I need an attraction in the type of concerthall. Question: Who has spoken the sentence 18? (A) User (B) System
Output: 


Answer: (A) User