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: Can you book it for me. From Thursday, for 2 nights and 3 people. Sentence2: Yes please. I need to book it for 3 people. Once booked can I please have the reference number? Sentence3: Alright got your tickets booked, the total fee is 24.24 GBP payable at the station. Your reference number is: O14QEE79 . Anything else I can help with? Sentence4: I definitely want a 4-star hotel, not a guesthouse. I don't care about parking, but I do need free wifi. Sentence5: how about huntingdon hotel in the west? Sentence6: That sounds great. Can you give me some information about it? Sentence7: I'm looking for a train departing on saturday from cambridge. Sentence8: I'm glad we were able to help you. Goodbye! Sentence9: Absolutely! Your stay has been booked, and the reference number is 97Z4GAQ7 . Is there anything else I can help you with? Sentence10: Getting out of cambridge for awhile going to stansted airport and would like to leave anytime after 12:30 please Sentence11: TR8476 will cost you 8.08 pounds. can i book it for you? Sentence12: Yes, we're also looking for a hotel to stay at when we're in town. Sentence13: I can help you with that. What amenities are you looking for? Sentence14: No, thank you. Sentence15: Absolutely. It's an expensive 4 star hotel that offers free wifi and free parking. The hotel is located at kingfisher way, hinchinbrook business park, huntingdon. Can I book it for you? Sentence16: Escaping for the weekend, huh? Where are you headed? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User