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: There are 17 options. Is there a specific area that you would like to stay in? Sentence2: I need something in the moderate price range, preferably Eastern European food. Sentence3: Could I also get the car type please? Sentence4: Yes, let's try looking for an Italian restaurant please. Sentence5: No, that's everything I need, thank you for your help. Sentence6: Sure! I'd suggest the Avalon, a moderately priced guesthouse in the north with free wifi and 4 stars. How does that sound? Sentence7: I have booked it for you. Your reference number is UBTSOUBT . Is there anything else I could help you with today? Sentence8: Let's try a guesthouse, please. Sentence9: Can you just give me the postcode, phone number, and address? Sentence10: I have one in the south, moderate price, would you like to book that one? Sentence11: I need a taxi to commute to the restaurant and will need it until I leave at 02:15 and after, can you give me a contact number for the taxi and what car type? Sentence12: There are nine restaurants in the south. What is your price range or type of food you prefer? Sentence13: Oh, sure. Be looking for a grey Volvo to pick you up. Is there anything more I can assist you with? Sentence14: I also need a room, with wifi and in the moderate price range. Sentence15: The Avalon sounds lovely. Would you book it for 3 nights starting Friday for 4 people? Sentence16: Unfortunately, I don't have anything that meets those requirements. Can I try another type of cuisine? Sentence17: The pizza hut cherry hinton is at G4 Cambridge Leisure Park Clifton Way Cherry Hinton postcode cb17dy phone number 01223323737 Sentence18: You're very welcome. Feel free to come back if you have any other questions! Sentence19: The contact number for the taxi is 07992886663. Sentence20: Looking for place to eat in the south Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User