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: It really needs to depart from Norwich so I can arrive by 13:15 Sentence2: I was able to book that. The reference number is BY848B54 . 88 GBP is payable at the station. Sentence3: You are welcome. Goodbye. Sentence4: I'll take 5 tickets on the 11:16, please. Any may I have the reference number? Sentence5: Certainly, you can leave Norwich Wednesday at 10:16 and arrive by 11:35, or leave at 11:16 and arrive by 12:35. Which would you like? Sentence6: TR5725 From London kings cross to Cambridge Wednesday leaving at 05:17. Does that work for you? Sentence7: Nah, I'm not picky. Surprise me. I will need a phone number, address, and postcode, though. Sentence8: There are fifteen cheap locations in the centre of town, do you know what kind of food you're looking for? Sentence9: Alright, lets give Zizzi Cambridge a shot, their phone number is 01223365599, their postcode is cb21ab, and their address is 47-53 Regent Street. Sentence10: Great thank you I think I have all I need Sentence11: I am looking for a train going to Cambridge leaving on Wednesday. Sentence12: Thanks! I'm also looking for a place to dine in the center that's cheap. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User