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, I think that would be fine. Something in the north, please. Sentence2: Sure, choose one for me. Sentence3: How about for 3 nights? Sentence4: Unfortunately, there is no availability at any of the 7 guesthouses for your needs. Do you want to book for another day or for a shorter stay? Sentence5: That did the trick. I was able to book for 2 people for 3 nights starting Wednesday at the Acorn Guest House. Reference number is G591ZUVT . Sentence6: One more question. How many people are in your party? Sentence7: Unfortunately, I don't have any hotels meeting those requirements, but I do have several guesthouses that do. Would you be interested in one of those? Sentence8: You're welcome. Goodbye. Sentence9: Not really. As long as it's in the north it's good. Sentence10: Thank you so much! That's all. Bye! Sentence11: Could you help me find a moderately priced 4 star hotel? Sentence12: Please make the reservation for 2 people. Sentence13: I need it for 4 nights starting on wednesday. Sentence14: There are 7 guesthouses that fit your needs. May I recommend Arbury Lodge Guesthouse? Sentence15: There is no availability at Arbury on Wednesday, unfortunately. Would you like to try a different hotel? Sentence16: Sure, that sounds fine. Can you book that for me? Sentence17: I have 7 guesthouses in the north that are moderately priced and 4 stars, are you looking for internet or parking? Sentence18: When and how long are you wanting to stay? I can see what is available. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User