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: it should be there by 11:45. Sentence2: I also need to book at a taxi to commute between the two places. Sentence3: Thank you very much! Sentence4: When would you like the taxi to arrive at your destination? Sentence5: I'm looking to find lodging in a hotel in the expensive price range Sentence6: Also looking for information on Saint Johns College. Sentence7: Yes it is booked. May I help you with anything else today? Sentence8: Thank you. Can you book the Lensfield for 7 people and 5 nights beginning on Wednesday? Sentence9: OK, I have five in several areas of town. Sentence10: That brings us to two fine choices, the Gonville and the Lensfield. Both are rated 3 stars. The Gonville is in the centre, while the Lensfield is in the south. Sentence11: No that's all I needed. Thank you for your help. Have a great day. Sentence12: You have it booked then? Sentence13: Okay, the book has been completed! The car will be a yellow toyota and the number is 07626630212. Is there anything else I can do for you? Sentence14: I need it to be a 3 star as well. Sentence15: I have those reference number X83Q82E5 . Sentence16: Saint John's College is located in the city centre. It's phone number is: 01223338600. The address is Saint John's Street. It has an entrance fee of 2.5 pounds. Sentence17: Thank you for calling. Enjoy your stay. Sentence18: You as well! Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User