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: Nope, that's all I needed. Thanks so much! Sentence2: Yu Garden is excellent. Their phone number is 01223244149. Is there anything else I can help you with? Sentence3: Can you book my a taxi between the two? I want to leave Camboats for Yu Garden by 8:30. Sentence4: I have a lot of choices for Chinese food. What price range were you looking for? Or area? Sentence5: No that is all thank you! Sentence6: I am sorry I do not see any place that serves Christmas food. Would you like me to look for a different type of food? Sentence7: Are there any places that serve Christmas food? I heard there might be something like that around here. Sentence8: No preference, just pick a nice one and provide me with the name and phone number please. Sentence9: We are happy to help. Thank you for using our service. Sentence10: There is one boat attraction in the east near Yu Garden called Camboats, located at The Plough, Green End, Fen Ditton. Their number is 01223902112. Anything else? Sentence11: Your taxi is booked and it will be a yellow tesla. Is there anything else I can help you with today? Sentence12: Ok, so their number is 01223244149? Is there any Chinese attractions around the same area as the Yu Garden? Sentence13: There are no Chinese attractions in town. Is there a different type of attraction that you are looking for? Sentence14: How about a boat attraction? Sentence15: How about some Chinese food? Sentence16: Also, just in case you need it the contact number for the taxi is Contact number 07633485095. Is there anything else I can do for you today? Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User