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 also need a train Sentence2: One of your options is Worth House, it has a 4-star rating, would you like me to book it for you? Sentence3: Happy to be of service, and enjoy your time in Cambridge! Sentence4: I'm going to london liverpool street. I want my train to leave after 14:45. Sentence5: You are all set, the cost is 66.39 GBP payable at the station .The Reference number is : P11XWALE Sentence6: Yes, that's perfect. Can you please book it for the same party and provide me with a reference number. Sentence7: Okay, your booking was successful. Your reference number is 0HRI1K18 . Is there anything else I can help you with? Sentence8: Let's make a booking for 6 people, 5 nights starting wednesday Sentence9: Hello, I am looking for a guesthouse that includes free parking. Sentence10: Ok, first I'll need to know where you are departing/arriving and what day? Sentence11: I have one leaving at 15:59. Will that work? Sentence12: Where will you be arriving at? Sentence13: My plan is to depart from Cambridge this Saturday. Sentence14: There are over 20 results. Is there a certain area you'd like to stay? Sentence15: Cheap price and North part of town Sentence16: Great, thanks for your help! Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User