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, that's all I need today. Thank you so much. Sentence2: I need to leave after 09:15, please. Sentence3: How about bridge guest house? They are moderately priced with free wifi and parking and 3 stars. Sentence4: Absolutely! What time do you need to arrive by? Sentence5: Your train has been booked for 6 people. The train ID is TR2083. Your reference number is WCVY3PV1 . Sentence6: You have a few options available if you're traveling from bishops stortford to cambridge. There is a train leaving at 09:29, Does that work for you? Sentence7: That sounds great. Can I book 2 nights for 6 people starting on Friday. Sentence8: Thanks. I'm also looking for information on moderately priced hotels with free wifi. Sentence9: No I do not. Sentence10: Do you have a preferred area of town? Sentence11: I have you booked, the reference number is VM1KGTU7, can I help with anything else? Sentence12: Great. Let's book it for 6 people. Give me the reference number. Sentence13: I'm sorry. Nothing is coming up for your specifications. I need you to narrow down your info. Sentence14: The place must have a 3 star rating and include parking. Sentence15: You have 17 options that meet that criteria. Would you like a recommendation or do you want to narrow your options down? Sentence16: Well lets try again and book me in what you choose for 2 nights from Friday for 6 people. Sentence17: Thank you for calling. Enjoy your trip! Goodbye! Sentence18: Can you help me find a train that leaves on friday departing from bishops stortford? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System