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 was able to book you. Your reference number is E7AJ44N7 . Sentence2: I also need to find a guesthouse to stay in that is 4 stars. Sentence3: No, that will be all. Thanks. You've been a great help. Goodbye. Sentence4: Okay, I've booked your room for 8 people starting on Monday at the A&B Guest House. Your reference number is C6M738RF . Anything else for you today? Sentence5: Ok great, I need a room booked for 8 and for 5 nights starting on the Monday. Sentence6: Yes there is internet. Sentence7: You can just pick one for me. I'd like a 4 star guesthouse with free wifi. I need a room Monday for 5 nights and 8 people. Sentence8: I'd be happy to help with your request, which place did you want to book a room at? There are 18 results and all have free wifi. Sentence9: Do any of them have free wifi? Sentence10: TR1997 leaves Cambridge at 09:01 on Saturday and arrives in broxbourne at 10:01. Will that work for you? Sentence11: Great can you get me 8 tickets please? Sentence12: we have quite a few when were you planning your stay? Sentence13: Thank you for using the Cambridge TownInfo centre. Goodbye Sentence14: I am looking for information in Cambridge Sentence15: Okay, and what kind of information can I retrieve for you today? Sentence16: I need to know if any trains are running to Broxbourne on Saturday that arrive by 10:30. Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System