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 of course! I do apologize. The Reference number is : 29D8WR58 . The table will be reserved for 15 minutes. Can I assist with anything else? Sentence2: No, that should be everything. Thanks! Sentence3: No, thank you for being a great customer! Good bye. Sentence4: There are two in Cambridge. One in the south and one in the centre. Do you have a preference? Sentence5: I also need a taxi from the park to Nandos. Want to get there by 12:00. thanks Sentence6: I need a restaurant in the cheap price range that serves Portuguese food. Sentence7: I have booked a taxi for you. It will be a red Ford and the contact number is 07413433001. Is there anything else I can do for you? Sentence8: There is no entrance fee. Sentence9: I still need the reference number. Sentence10: Yes. Do you know anything about a place called Sheep's Green and Lammas Land Park Fen Causeway? Sentence11: What is their entrance fee? Sentence12: It does not make a difference as long as they have reservations for 4 on sunday at 12:00. Could I get a reference number? Sentence13: The address is fen causeway, newnham road. What else can I do for you? Sentence14: What is the full address for that park? Sentence15: It's a free park in the south. Would you like more details? Sentence16: Sure, i have booked Nandos sunday 12:00 for 4. May I help with anything else? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System