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: Thank you for contacting Cambridge TownInfo centre. Goodbye! Sentence2: I do not have any listings for 4-star hotels with free parking. Perhaps you would like to try a different star rating? Sentence3: Okay, there are several of those it looks like, are you also wanting to stay in the centre as well? Sentence4: Please try it for 2 nights. Sentence5: That booking was not successful. Would you like to try another day or a shorter stay? Sentence6: book for 2 people 3 nights from tuesday. i also want to book a taxi to leave the hotel by 13:30. get contact number and car type Sentence7: I have no preference besides colleges. Please recommend one. Sentence8: I was wondering if you had any colleges I could visit during my stay? Sentence9: I apologize it looks like there was a booking error. The huntingdon does not have availability. Would you like to try another hotel or length of stay? Sentence10: huntingdon marriott hotel is found in kingfisher way, hinchinbrook business park, huntingdon Sentence11: Yes, I'm looking for a place to stay with free parking and moderate prices. Sentence12: Excellent! I also need a taxi to go between the places. I want to leave the hotel by 13:30. Sentence13: That sounds great. Can I get their phone number please? Sentence14: Actually, there might have been an error int he system before. I booked the Huntington Marriott Hotel for 2 people, 3 nights, starting on Tuesday. Reference number is J4Z0CZ41 . Sentence15: How about a hotel that is the expensive price range? Sentence16: I booked a grey Skoda to pick you up. The contact number for the taxi is 07491898705. Sentence17: I have 18, what area would you prefer? Sentence18: Awesome! That's all I need. Thanks for your help. Sentence19: My favorite is Saint Catharine's College. It is in city centre, and they are free to enter. Sentence20: Okay, may I get a reference number please? Sentence21: How about for 2 nights Sentence22: Saint Catharine's college's phone number is 01223338300. Can I assist you with anything else? Sentence23: I was able to book your reservation for 2 days. Sentence24: No need, but I'd like a hotel, not a guesthouse, that's in the 4 star range. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User