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: Their phone number is 01223334860. Can I help you with anything else? Sentence2: I would also like to visit an attraction. I would like to find a college in the centre. Sentence3: The price doesn't matter to me. I'll be looking for places to visit in the centre, so if one is located there, that's fine. Sentence4: There are 19 hotels available in the 4 star range. Is there a specific area or price you would like? Sentence5: That is all, thank you. Sentence6: Might I recommend Downing College which has free admission and is located on Regent Street with postcode cb21dq. Sentence7: I am looking for a hotel in cambridge that includes free parking and wifi can you help? Sentence8: The cheap one is fine. Book it for 4 people for 4 nights starting Tuesday Sentence9: Okay, I have a cheap guesthouse in the center, and and expensive hotel as well. They both have 4 stars, which one sounds best? Sentence10: I have successfully booked a 4 night stay at the alexander bed and breakfast, your reference number is 8BHSGT90 . Sentence11: How about ones with four stars as well? Does that narrow it down any more? Sentence12: Would you like for me to search for something else. Sentence13: Could you get me a phone number for Downing College please? Sentence14: I am sorry but I need more information from you. Which area and pricerange do you prefer? Sentence15: Not really, just select one and book it for four people staying four nights froms Tuesday. Sentence16: There are 29 options. Would you like a recommendation, or do you wish to narrow the search? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User