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 place to eat christmas food Sentence2: That is all, thank you very much. Sentence3: You're welcome, have a wonderful day! Goodbye. Sentence4: Do you have a price range or area preference? Sentence5: There is Holy Trinity Church on market street Sentence6: Yes, how about a restaurant that serves Indian food. Sentence7: Okay great, could you give me the phone number and postcode? Sentence8: I was able to get you a table at Rajmahal in the east part of town at 7 Barnwell Road Fen Ditton, reference number FRFMWN4U . Anything else I can help with? Sentence9: I'm sorry, but the price range should be moderate. The area doesn't matter. I just need one that is available for 3 people at 13:00 on sunday. Sentence10: any range is fine. Sentence11: Are there any good attractions in the centre of town? Sentence12: Unfortunately, I am not finding anything that serves christmas food. Would you like me to try another type of food? Sentence13: Do you have an area preference? Sentence14: Yes. Their postcode is cb23nz and you can call them at 01223355397. Is there anything else I can help you with? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User