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: 4 people at 13:45 on saturday, please. Sentence2: I would like an Italian restaurant. Sentence3: I've booked you a table for 4 at 13:45 at Curry Prince. Your reference number is GE1NWVTX . Is there anything else I can help with today? Sentence4: Are there any other restaurants in the same area in the moderate price range? Sentence5: I need help finding a place to eat that is moderately priced and located in the east. Sentence6: Happy to be of service, and I hope you enjoy your meal! Sentence7: I have three restaurants with that information,can I ask what type of food you are looking for to narrow it down? Sentence8: Pizza Hut Fen Ditton is the only moderate Italian restaurant in the east. Would you like a reservation? Sentence9: Sure. Please book me at one of those. Sentence10: Booking was unsuccessful. Want to find another restaurant? Sentence11: Yes I have several Indian restaurants if you are interested. Sentence12: I'd be happy to. What day and time would you like the reservation, and for how many people? Sentence13: Yes, please, I would like a reservation for 4 people at 1:45 on Saturday. Sentence14: No, that's all I needed. Have a nice day. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System