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: I have 5 moderately priced British restaurants in the centre but I do not have any cheap ones. Would you like me to book one of these? Sentence2: No thank you. Can you recommend me one and give me their phone number and address? Sentence3: No, that's everything. Thank you! Sentence4: As long as they serve British cuisine and moderately priced, that sounds great. Thanks for your help. Sentence5: The Cotto is a great choice. Their phone number is 01223302010 and adress 183 East Road City Centre. Is there anything else I can help you with? Sentence6: Well is there perhaps a cheap option serving that type of food in the center? Sentence7: Sorry, but there aren't any restaurants of that type. Would you like to try a different cuisine? Sentence8: They are indeed. Is there anything else you need today? Sentence9: Thank you for contacting us and have a great day! Sentence10: No I'm sorry there isn't anything fitting those details. Can we try a different area or type of food? Sentence11: I'd like to get moderately-priced Polynesian food. Sentence12: How about British food? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User