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 am looking to go to cambridge on thursday. Sentence2: Yes. There are two available trains. One leaves at 5:29 and arrives by 6:07 and the other leaves by 7:29 and arrives by 8:07. Which would you prefer? Sentence3: I need to leave on Thursday and get there by 9:15, is that OK? Sentence4: I am looking for a train departing from Bishops Stortford. Sentence5: It's my pleasure. Goodbye! Sentence6: Sure, we have one other option TR1242 leaves at 07:29 and arrives at 08:07. For 8 people your reference number is : 6A76VGSK . Sentence7: I'd like the later one, please. I'll need 8 tickets. Sentence8: I have 10 available trains. Is there a particular time you would like to leave or arrive by? Sentence9: Okay great! Thanks for all your help. Sentence10: There are 70 trains departing from that location, would you like to narrow it down some? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User