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: Yes, can you also help me find a hotel that has free parking and is expensive? Sentence2: What day and from where? Sentence3: I would like a 4 star hotel. Location isn't important, just quality hotel. Sentence4: Sure! Let's narrow it down a bit. Any preferences on location or star rating? Sentence5: The University Arms sounds good. I'd like to book 4 nights for 1 person, beginning on Friday. And I'll need the reference number, please. Sentence6: You are welcome. Thank you for using our service! Sentence7: We have a train departing from Kings Lynn, Friday at 15:11 which will be arriving at 15:58. The price is 9.80 pounds and the total duration of the trip would be 47 min. Would you like me to book this for you? Sentence8: Thank you for all the information. I would like to book this. Sentence9: The Huntingdon Marriott and the University Arms are both expensive 4-star hotels with free internet and parking. Is either of these of interest to you? Sentence10: That should be it, thanks! Sentence11: I would like it to have free parking and internet. Sentence12: I am leaving Friday from Kings Lynn. Sentence13: You booking was successful. Your reference number is XWZQ8GBA . What else can I help you with? Sentence14: Consider it done. It has been booked. Anything else? Sentence15: Hi, I am looking for a train that will be arriving by 16:00 in Cambridge. Sentence16: Sure thing! There are 21 four star hotels. Do you have any other needs, like internet, parking, or price range or style? Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User