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 was able to book a table for two at restaurant alimentum located in the south your reference number is 70K7T35N . Is there anything else I can help with? Sentence2: I have two restaurants in the south. They serve italian or modern european. Would you like information on either of those? Sentence3: Is there anything else I can help you with today? Sentence4: Thank you. I need it for 4 people at 12:15 on Saturday Sentence5: Sorry, not sure I follow. Can you recommend a south african food restaurant? Thanks. Sentence6: Thank you for contacting us and have a nice day. Sentence7: No that will be all thank you. Sentence8: Modern European will be fine. Can you reserve a table at one please? Sentence9: Unfortunately there are no restaurants that serve South African food but I can look for other types of cuisines if you want. Sentence10: I need a moderately priced restaurant in the south of Cambridge Sentence11: Yes, I will book you a table now. Sentence12: No, I was hoping to eat some South African food. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User