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: Do you see a Chinese restaurant in the same area as the hotel? Sentence2: I've found the rosa's bed and breakfast which is a cheap guesthouse in the South. Would that work for you? Sentence3: Yes how about for 16:45? Sentence4: They're located at 53 Roseford Road in postcode cb22ha. And yes, they do offer free parking. Sentence5: Yes for 7 people for 17:45 on a Monday. Sentence6: I'm sorry, that booking was unsuccessful, too. Would you like to try another time? Sentence7: Can we make the reservation an hour later? Sentence8: No, you have been very helpful thank you. Sentence9: We have one restaurant that matches your needs, it's The Missing Rock in the east area. Would you like me to book for you? Sentence10: Your best choice would be The Lucky Star, which is on Cambridge Leisure Park. Would you like to make a reservation? Sentence11: I'm looking for a hotel in the south, and I'd like cheaper options please. Sentence12: There are going to be a lot of us, so something cheap would be best. Sentence13: Great. Do they also offer free wifi? Sentence14: I am also looking for international food that is in the cheaper price range. Sentence15: No thank you- please just give me the address and phone number. Sentence16: The address is Finders Corner Newmarket Road, and the phone number is 01223812660. Sentence17: They sure do. Would you like to make a reservation? Sentence18: Sure! I have three options for Chinese food in the south with both cheap and expensive price ranges. What price range did you want for this restaurant? Sentence19: No, that's ok. Could you just give me the address and postcode and please let me know if they have free parking? Sentence20: Let us know if we may help further. Thank you, good bye. Sentence21: Does it have a star of 4? Sentence22: I apologize but I was unable to book your party for that time. Would you like to try a different time slot or a different day? Sentence23: Yes it does. Sentence24: I have your table booked. The reference number is : GI0NB9LA . Is there anything else I can help you with? Question: Who has spoken the sentence 20? (A) User (B) System
Output: 


Answer: (A) User