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: Have a great day! Goodbye! Sentence2: I also need help finding a place to go. Are there any cinemas I could visit? Sentence3: Yes I will need the reference number. Sentence4: OK, I actually booked you on TR7621. That's the 12:40 on Tuesday to Stansted. Your reference number is R14O2PJF . Sentence5: Okay great! Where are you departing from? Sentence6: Will you be needing a reference number? Sentence7: Their postcode is cb11ps. Could I help you with anything else today? Sentence8: I'll be departing from Cambridge. Sentence9: Yes, please book it. Sentence10: No thank you. Sentence11: All I need is the postcode. Sentence12: I can go ahead and book that for you. Sentence13: the vue cinema is in the city center. would you like to purchase tickets or know more? Sentence14: I have train TR0188 that leaves at 12:40 and arrives at 13:08, will that work for you? Sentence15: I need to take a train to Stansted airport, arriving no later than 13:30. Sentence16: Does TR0188 leave on Tuesday? I need a booking for 2 people on Tuesday. Question: Who has spoken the sentence 5? (A) User (B) System
Output: 


Answer: (B) System