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 three options to choose from. The Huntington Marriott Hotel, The Cambridge Belfry, and the University Arms Hotel. Which would you like? Sentence2: Let's go with Shiraz. I need a booking for 5 at 16:30 on saturday. Sentence3: Is it available on Saturday. Sentence4: I am also looking for a four star hotel. Sentence5: Thanks for all the help. That's all I needed today. Sentence6: How about alexander bed and breakfast? Sentence7: Yes. Please book it for 4 people and 5 nights beginning saturday Sentence8: I'm looking for an expensive restaurant in the centre Sentence9: Your table has been booked for 16:30 and will be reserved for 15 minutes. The reference number is VORP2NWK . What else can I do for you today? Sentence10: Which part of time would you like to stay in? Sentence11: Great. Is there one that serves mediterranean food? Sentence12: I want it to be a 4 star guesthouse with free parking and internet Sentence13: You are booked. The reference number is C9LRRET8 Sentence14: Maybe the centre near my restaurant. Sentence15: sure, i have 33 options for you Sentence16: I happen to have 2 great ones. La Mimosa is available, as well as the newer one called Shiraz Restaurant. Would you like more info on one of these? Sentence17: Thanks for contacting Cambridge TownInfo centre have a wonderful trip. Goodbye. Sentence18: Yes. Would you like me to book that for you? Sentence19: There are actually 16 guesthouses to choose from. Is there an area of the city that you prefer? Sentence20: Starting Saturday for 4 people for 5 nights. Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User