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: They do have free parking. The address is 53 roseford road. Would you like to book a room? Sentence2: I have 2 options for you, is there a price range you are looking for? Sentence3: Can you provide me with the address and if they have free parking? Sentence4: Ok, can I get the Train ID and the departure and travel time please? Sentence5: The train you may prefer is the TR5867 that leaves at 18:01 and arrives by 20:44. It takes 163 minutes. Would you like that one? Sentence6: There is a train leaving at 5:00. Sentence7: No thanks, just grabbing some information for now. Thank you for all of your help. Sentence8: May I suggest Rosa's Bed and Breakfast? It's a cheap, 4 star, guest house. Sentence9: No particular price range. I would like to stay in a 4 star guesthouse. Sentence10: That's perfect. I also need a hotel to stay in. Should be rated 4 stars Sentence11: I'm looking for a Saturday train. Sentence12: Have a nice day. Sentence13: There are 21 hotels that meet your criteria. Let's try to narrow it down. Can you tell me more about your preferences? Sentence14: Of course. I have 404 rail departures on Saturday, could you help me with your itinerary please? Sentence15: Anywhere in the south. As long as it has free wifi. Sentence16: I want to leave cambridge to birmingham new street and arrive by 20:45. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System