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 am looking for an expensive restaurant. Sentence2: Yep, headed to Cambridge on Tuesday. Sentence3: Will you be traveling to Cambridge on the train? And if so, what day would you like to travel? Sentence4: I'm sorry, there are no restaurants in the centre that serve austrian food, would you like to try another area? Sentence5: No, thank you. Can you tell me the Train ID, please? Sentence6: I also need a train that departs from Stansted airport after 09:15. Sentence7: Can I just get the contact information for La Mimosa for right now? Sentence8: That's ok, thank you for your help. Sentence9: That is all thanks. Sentence10: There are two la mimosa and shiraz restaurant, I recommend la mimosa would you like me to book it for you? Sentence11: Do you have any restaurants that serve Mediterranean food? Sentence12: Certainly. The train ID is TR1610. Is there anything else I can do for you? Sentence13: There is a train leaving at 9:24 and arriving in Cambridge by 9:52. Would you like me to book that for you? Sentence14: Thank you for contacting us and have a ncie day. Sentence15: I'm looking to dine at a restaurant in the centre that serves Austrian food. Can you help? Sentence16: No problem, the Phone number is 01223362525. Postal code is cb58aq, Address is Thompsons Lane Fen Ditton. Is there anything else i can help you with? Sentence17: Is there anything further I can help you with today? Sentence18: There are three mediterranean places in the centre area, any price limitations? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User