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: cheap, but i still need free wifi. Sentence2: That was all I needed today, thank you very much. Sentence3: I would suggest the alexander bed and breakfast, it has a 4 star rating, free parking and internet and it is in the cheap price range. Would you like a reservation? Sentence4: Yes, that is correct Sentence5: There are 9 that meet those requirements, was there an area you wanted to stay in? Sentence6: Okay, the booking was successful. Your reference number is M3UVOLVXD . The total fee of 226.8 GBP is payable at the station. Sentence7: Tuesday please. Thanks Sentence8: We have 35 trains taking that route, what day of the week will you need that? Sentence9: What day would you like that on? Sentence10: TR8632 leaves at 19:09. Want to book it? Sentence11: I would like to leave on tuesday. Sentence12: I need to catch a train that departs from Leicester after 18:30. Sentence13: Thank you for using our service today. Sentence14: Okay. Your booking was successful. The reference number is W7DGP5W4 . Can I help with anything else today? Sentence15: What's the best one of those options? I need it for 4 nights. Sentence16: Just to be certain, book 6 train tickets to cambridge from Leicester on tuesday at 19:09, correct? Sentence17: Thanks! I'm also looking for a place to stay that's a guesthouse. Sentence18: Yes, please. I'll need a booking for 6 and the reference number. Sentence19: What price range would you like? Sentence20: Yes please. For 5 nights for the same group of people. Question: Who has spoken the sentence 18? (A) User (B) System
Output: 


Answer: (A) User