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: No, thanks. I do need to look for a train, too. Can you help me? Sentence2: We have many trains that match your request, is there a certain time you need to arrive by? Sentence3: Yes, can you tell where you are going and coming from please? Sentence4: You are welcome! Can I help you book that? Sentence5: I have booked your party of 4 on the TR3262 departing Cambridge for Broxbourne on Thursday at 11:01. Your reference is AGMKNY6Z . Can I help you more today? Sentence6: I need to leave from Cambridge and go to Broxbourne on Thursday. Sentence7: Ok, how many tickets would you like? Sentence8: Hi. I am looking for information about a hotel called Home from home. Sentence9: No any of them are fine. Please give me the reference number too. Sentence10: You are welcome. Have a good day. Sentence11: I need tickets for 4 people. I need something that leaves after 10:45 as well. Sentence12: No, thanks, that was all I needed. Sentence13: I can help with that. It is a guesthouse located in the north. They are moderately priced. It has a 4-star rating and offers free parking and wifi. Sentence14: i would like to go there soon, so thank you for the information Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User