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: The west is home to 7 museums. Entrance fees are either free or 3.50 pounds. I personally recommend kettle's yard. Sentence2: Do you have any other constraints, such as location or price range? Sentence3: No that's all I need. Have a good night. Sentence4: Sure, that sounds fine, as long as you're sure it has free parking. Sentence5: i am looking for a place to stay. The hotel doesn't need to include internet and should include free parking. Sentence6: Alexander bed and Breakfast - 56 saint barnabas road cb12de phone - 01223525725 Sentence7: Thank you. I'd also like to find a cinema in the west side of town. Do you know of any in that area? Sentence8: And the reference number ? Sentence9: Kettles Yard is located on Castle Street. Is there anything else I can help you with? Sentence10: It does offer free parking. Would you like me to book it for you? Sentence11: Okay, I need to know when you would like to leave the hotel and when you'd like to arrive at the museum please. Sentence12: I'm sorry but there aren't any cinemas in the west. Would you like to try another location. Sentence13: We still have a lot of great options to choose from. Can I recommend the Alexander Bed and Breakfast in the centre of town? Sentence14: Let's try for a museum in the west instead Sentence15: Yes. I would like a taxi from the hotel to the museum please. Sentence16: The location and price range don't matter to me. I want a guesthouse with 4 stars. Sentence17: Thank you for using our service. Sentence18: Your vehicle is a black volvo and they cbr at 07186950865 any other questions? Sentence19: I'm sorry about that. Your reference number is 4PSP6FIB . Sentence20: book for 1 people for 5 nights starting Thursday and get me the reference number please Sentence21: That works, can you please provide the address for me? Sentence22: I'd like to leave the hotel by 10:30. Question: Who has spoken the sentence 19? (A) User (B) System
Output: 


Answer: (B) System