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: If there is no hotel availability, I will accept a guesthouse. Is one available? Sentence2: There are 6 nightclubs located in Cambridge. 5 in the Centre and 1 in the South; do you have a preference? Sentence3: They all also offer free parking. Would you like to book a room? Sentence4: No preference, surprise me. I'll just need the postcode. Sentence5: Yes, I'd prefer a hotel over a guesthouse and I need to stay in the north. Sentence6: Do any of the guesthouses have access to internet for their guests? Sentence7: The Soul Tree Nightclub I have heard is the best. Their postcode is cb23qf. Anything else you need? Sentence8: Okay, I am glad I could help. Have a wonderful day. Sentence9: Yes, there are 7 guesthouses in the north that meet your needs. 6 are moderate and 1 is cheap. Would you like more information? Sentence10: Okay. Thank you very much for your help. Sentence11: There are 19 hotels available with a 4 star rating and free parking. Would you like to add any additional preferences? Sentence12: How about free parking? Sentence13: Yes I need to find a hotel with free parking and 4 star rating. Sentence14: yeah all of them do, any other preference? Sentence15: I think that takes care of everything. Sentence16: The Acorn Guest House is at 154 chesterton road, and its phone number is 01223353888. There are no nightclubs in the north part of town. Sentence17: Can I help you with anything else today? Sentence18: I'm afraid no hotel in the north matches your inquiry, perhaps a different star rating? Sentence19: Could I get the phone number and address of one of them? Also can you find me a nightclub nearby and give me their postcode? Sentence20: I am going to visit and would like to go to a nightclub. Any suggestions? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User