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: I'm looking for a train. I need to leave from Cambridge on Tuesday and go to Leicester. Sentence2: I was able to make a reservation for Saturday night at University Arms Hotel for 6 people. Your reference number is 7XXHIROP . Is there anything else you need today? Sentence3: Do you have a time that you would like to leave by or arrive by? Sentence4: Thank you for contacting Cambridge TownInfo centre. Goodbye! Sentence5: Which day would you like to check in? Sentence6: TR2950 will arrive at 08:06, would that work for you? Sentence7: Actually, they both do offer free wifi and free parking. Alexander bed and breakfast is a guesthouse and the University Arms hotel is a hotel type. Do you have preference? Sentence8: I'd prefer a hotel. Can you book that for 6 people and 3 nights? Sentence9: Yes, can I get 6 tickets please and I'll need the reference number too Sentence10: the total fee is 226.8 GBP payable at the station and the reference number is : XYAOCTIY . May i help you with anything else. Sentence11: I am also looking for a place to stay that has 4 stars and is in the centre. Sentence12: Yes, I need to arrive by 8:45. Sentence13: Yes, could you try for a stay of 1 night? Sentence14: That is all I need. Thank you for your help! Goodbye! Sentence15: Starting saturday, either place is fine if available. Sentence16: We have two choices, alexander bed and breakfast which is in the cheap prince range and university arms hotel whic is in this expensive price range. Sentence17: The booking did not go through, can you book another day or a shorter stay? Sentence18: I do need free wifi included, so whichever of those has wifi is the best! Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User