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: You're welcome. Goodbye. Sentence2: Kings Lynn to Cambridge. Sentence3: TR1031 leaves at 15:11. Does that work for you? Sentence4: Yes that works please book for 5 people. Sentence5: Ok, and where will you be traveling to? Sentence6: Yes, the city centre was where I was planning to go. Sentence7: That would be fine I need the phone number, postcode and address please. Sentence8: No thanks. You were very helpful. Until next time. Goodbye. Sentence9: Jinling Noodle Bar is my favorite! It is moderately priced and in the Centre. Would you like to book a table? Sentence10: You are set, reference number is 5S55128O, any other questions Sentence11: The address is 11 Peas Hill City Centre cb23pp. The phone number is 01223566188. Sentence12: We have several Chinese restaurants in the city center, is that where you were looking to eat? Sentence13: I was looking for a chinese place in Cambridge. Sentence14: Thanks! I also need a train after 14:45 on Saturday. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User