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: Yes, it is. It's located on 154 chesterton road, cb41da. Would you like a room? Sentence2: I would like to leave after 15:15 on Thursday. Sentence3: Have a nice day, goodbye! Sentence4: We have a train departing Cambridge at 15:50, arriving at Ely at 16:07. Would you like me to book a reservation? Sentence5: They do indeed provide complimentary Internet access. Would you like to make a reservation? Sentence6: Your booking was successful. The total fee is 8.8 GBP payable at the station. Your reference number is H0BMD920 . Sentence7: Just one more question: Is it in the moderate prince range? If so, please give me their address. If not, I need something moderately priced. Sentence8: Yes that works great. Can you book 2 tickets for that train and give me the reference number? Sentence9: Great. That's all I needed. Thank you. Sentence10: No thanks. Not at this time. I would appreciate some help finding a train to get me to Ely though. Sentence11: Does that include free wifi? Sentence12: Can you tell me where you will be leaving from and on what day and time? Sentence13: I like acorn guest house. Need me to book a room? Sentence14: I am looking for a hotel to stay in with a 4 star rating that is in a guesthouse style. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User