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 five nightclubs in the centre. Is there another way I can narrow it down? Sentence2: Yes please. Book it for 6 people on Monday at 15:15. Sentence3: I'm so sorry, but they were unable to accommodate that day and time. Would you like to try for a different time slot or another day? Sentence4: Yes,what is another good time available for Tuesday night? Sentence5: The club salsa is located on 1 station road. The postcode is cb12jb and the entrance fee is 5 pounds. Is there anything else I could help you with? Sentence6: There are a few to choose from. Charlie Chan could be good, it's also in the centre. Would you like me to book you a table? Sentence7: Could I get the contact number for the taxi company as well please? Sentence8: Please recommend one that sounds interesting, and give me the entrance fee, address, and postcode. Sentence9: Alright, I have booked your taxi to go between the two destinations. You will be riding in a Black Toyota. Is there anything else I can do for you? Sentence10: I am looking for a hot nightclub around the centre. Sentence11: I have tried different restaurants and different times for Monday, but there doesn't seem to be availability. Would you like another day or maybe a different food type? Sentence12: No, that's all. Thank you. Sentence13: I am unable to find anything that matches is there something else you would like to eat Sentence14: How about Chinese food? Sentence15: Could you try it for 14:15? Any cheap Chinese place will do, it doesn't have to be in the centre. Sentence16: No problem, I have you booked for 6 people at The Lucky Star on Monday, at 14:15. Your reference number is VU6VN1X4 . Anything more? Sentence17: I would also like to book a taxi to go from the nightclub to the restaurant, arriving by the reservation time. Sentence18: The contact number of the taxi is 07791994031. Anything else I can help with? Sentence19: I'd like to find somewhere to eat, preferably on the cheap side and serving eritrean. Sentence20: You're are very welcome. Have a great day. Question: Who has spoken the sentence 19? (A) User (B) System
Output: 


Answer: (B) System