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 that would be all. Thank you Sentence2: I actually just need a taxi from the restaurant to the hotel after we eat. We will be done eating by 10:45, so please have the taxi for us by then. Sentence3: Okay, what time do you want to arrive at the restaurant by? Sentence4: Have a lovely day! Sentence5: Ok, I was able to book you at the Ashley Hotel. Your reference number is T0WK7HHS . Is there anything else I can do to help you this evening? Sentence6: Okay great. That's all the information I need for now. Thanks. Sentence7: You're very welcome, have a wonderful day. Sentence8: yes please for 3 people on satruday around lunch time Sentence9: There are 8 hotels with free parking. How about Ashley Hotel? It's a moderate 2 star hotel in the north with free wifi and parking. Sentence10: Yes I do,it is located at 4 Kings Parade City Centre, would you like to make a booking? Sentence11: Sure, the postcode is cb21sj, and the price range is moderate. Is that all you need today? Sentence12: Yeah, could I get the contact number and type of car, as well? Sentence13: Ok, you're taxi has been booked. Is there anything else I can do for you? Sentence14: No but I do need to make sure it is a hotel and not a guesthouse. Sentence15: Sure, is there an area or a price range you are interested in? Sentence16: Sounds great. I need it for one person and three nights starting Saturday. Thank you! Sentence17: Hi, do you have a listing for the copper kettle? It's a restaurant. Sentence18: The contact number is 07703313171 and the car is a white volkswagen. Sentence19: Oh, wait! While I have you, I can go ahead and check on hotels. I need a hotel with free parking. Sentence20: Actually, I don't need to reserve just yet. Can you please just give me the postcode and price range? Sentence21: Do you have a specific time in mind? Sentence22: Yes, I need a taxi to take me to and from the hotel and the restaurant. I need to leave the restaurant by 10:45. What taxi do you have available? Question: Who has spoken the sentence 20? (A) User (B) System
Output: 


Answer: (A) User