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: Okay, but do you still need a taxi? Sentence2: In the centre please Sentence3: Is there a gastropub in that area instead? Sentence4: Going from El Shaddai to the Cow Pizza Kitchen and Bar, and I need to arrive in time for my reservation at the restaurant. Sentence5: Does it have internet? Sentence6: Yes, let's book a table for 6 people at 14:45 on tuesday. Sentence7: Could I have the phone number and type of hotel? Also need a taxi to the restaurant and arrive by the booked time. Provide the contact number and car type. Sentence8: i also need a hotel room for two nights and 1 person and must have free parking Sentence9: yes i want to book a taxi to commute between the two places. Sentence10: Yes, we have one and it's called The Cow Pizza Kitchen and Bar. Would you like for me to book a reservation for you? Sentence11: The phone number is 01223327978. Sentence12: It looks like you will arrive by 14:45. Your booking is complete and the car type is grey audi. The contact number is 07534462642. Sentence13: unfortunately i don't have anything in that price range Sentence14: Thank you. I appreciate your quick response. Sentence15: OKay I will look into this for you and be back in a moment. Sentence16: to which direction will you be going? Sentence17: Yes it does and is included in the price! Sentence18: What area do you need it to be in? Sentence19: I think El Shaddai would be perfect for you. It's in the centre of town, 0 star, and has free wifi and parking. Can I book for you? Sentence20: We have 31 moderately priced restaurants in the center, just no Bistro, sorry. Sentence21: Not price specific but I want something 0 star. Sentence22: I am looking for a nice bistro in Cambridge, moderately priced would be good. Sentence23: Alright, your reservation is made with reference number V76UTC2C . Can I help you with anything else? Sentence24: thank you that will be all Sentence25: There's nothing moderate in all of the centre area? Or just bistro food? Sentence26: What price range? Question: Who has spoken the sentence 24? (A) User (B) System
Output: 


Answer: (A) User