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: Have a wonderful time. Sentence2: Also, I want a taxi to commute between the two places. Sentence3: Thai food sounds good. Could you check for a restaurant again in the centre of Cambridge? Sentence4: The address and postcode are 24 Green Street City Centre, CB23JX. Can I assist you any further today? Sentence5: yes, i'd like the phone number please. Sentence6: Thanks for the help, that is all for today. Sentence7: Sorry don't have any eastern european restaurants. Sentence8: I'm sorry, there aren't any Eastern European eateries in the centre. Can I check another part of town for you, or look for a different type of cuisine? Sentence9: What type of food are you looking for? Sentence10: The phone number is 01223354382. Can I help you with anything else today? Sentence11: Is there another price range or different cuisine you might like information on? Sentence12: I have your taxi booked. It will be a red lexus and your contact number is 07308367931. Is there anything else I may assist you with? Sentence13: I am looking for Eastern European food. Sentence14: Sure. I am looking for a restaurant near the centre of Cambridge. Sentence15: I need an expensive restaurant with Eastern European food Sentence16: I want to get picked up from the attraction by 23:45 and taken to the restaurant. Please make the taxi booking and give me the relevant info Sentence17: Thank you, that is all. Sentence18: The postcode is CB12IF and the entrance fee is unknown. Their phone number is 01223474144 if you would like to call them to find out. Sentence19: Sure, I can help you with that. Do you want to get picked up at Bangkok City or from The Man on the Moon? Sentence20: I have reservations Bangkok City restaurant but forgot to get the address and postcode. Sentence21: I found that attraction it is located at 2 norfolk street. The phone number is 01223474144. Sentence22: Yes, I'm also looking for a place called The Man on the Moon? Sentence23: Bangkok City is an expensive thai place in the centre of town, would you like more info or a booking? Sentence24: What is the postcode and entrance fee? Question: Who has spoken the sentence 21? (A) User (B) System
Output: 


Answer: (B) System