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 don't know yet. Do you know how much it will cost? Sentence2: Nah. Can you just book me a table at your favorite one? 2 people at 20:45 on Monday, please. Sentence3: Thank you very much for the help. Good bye! Sentence4: Yes, 14:45. Could you give me a departure time that meets my criteria? Sentence5: I would like the reference number if it s successful please. Sentence6: The reference number is 2DNK6C4B . Sentence7: Any arrival time in mind? Sentence8: How about 19:45 and give me a reference number Sentence9: Could you be more specific on where you are departing from and what day you want to travel? Sentence10: I was not able to book a table at 20:45. Would you like to try another time? Sentence11: Thank you. Goodbye. Sentence12: What train should I take to get to Cambridge by 14:45? Sentence13: One moment while I try to make the reservation for 19:45. Sentence14: There are several choices. Do you have a specific price range? Sentence15: Tickets are 16.60 pounds Sentence16: Depart from london liverpool street and should leave on monday. Sentence17: Okay. I am also looking for a restaurant. Are there any restaurants in the centre that serve asian oriental food? Sentence18: Yes, TR7040 leaves at 11:39 and arrives by 13:07. Would that work for you? Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System