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've made those reservations and your reference number is N90KBZUM Sentence2: Thanks a lot. That is all I need. Sentence3: Train TR2232 leaves Liverpool Street, London at 17:39 and arrives at 19:07. Would this work for you? Sentence4: how about TR9886? it arrives at 19:07 on Friday. Sentence5: Is it expensive? Sentence6: Yes that works. Go ahead and book me 7 tickets please Sentence7: Your booking was successful and your total cost is 116.2 GBP. Your reference number is BWXB511A . Sentence8: ashley hotel is a moderately price hotel in the north area. Would you like me to book a room for you? Sentence9: I would prefer one in the expensive range if you have any. Sentence10: Great thank you so much. Sentence11: ashley hotel is a great place with free wi fi Sentence12: The express by holiday inn is an expensive 2 star hotel in the east. They have free parking and free wifi. Will this work for you? Sentence13: Thanks again, goodbye. Sentence14: Yes. I need to book for 7 people starting on Wednesday and staying for 2 nights. Sentence15: Great! Can you please help me with finding a train as well? I need something leaving london liverpool street after 16:30. Sentence16: Have a great trip. Goodbye. Sentence17: Actually, can we try for Wednesday? I'll need tickets for the same group of people. Sentence18: I'm looking for a hotel that includes free wifi. Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System