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: Actually, could you shorten that to one night? Sentence2: TR8903 leaves Birmingham New Street at 18:40 and arrives in Cambridge at 21:23. It's a rather long trip. Sentence3: A cheap one with wifi, please. Sentence4: Great, we hope you have a great stay. Sentence5: Can you try the hotel with a 1 night stay on the same day? Sentence6: No, I would need it to be for 3 days and 8 people, what hotel could accomidate me? Sentence7: Thank you for your assistance. Sentence8: No, that will be all. Thank you so much! Have a good day. Sentence9: I have 6 places that would fit your needs. Do you have a specific price range in mind? Sentence10: I am sorry there are no hotels available. Would you like another type of lodging? Sentence11: Yes, I need a train from birmingham new street to cambridge. Sentence12: Please, book the Holiday Inn Cambridge, and I need the reference number. Also, I am looking to book a train the same day from Birmingham new street to Cambridge leaving after 18:30. Sentence13: I think allenbell would fit your needs. Would you like a reservation? Sentence14: No, but I would like to know the arrival time for the train fitting my criteria. Sentence15: Unfortunately there isn't any availability during that time. Would you like to book another day or shorten your stay? Sentence16: I am looking for a place to stay that has a 4 star rating in the east part of town. Sentence17: Is there a time you need to arrive by? Sentence18: There is one hotel available, Express by Holiday Inn Cambridge, however it is only 2 stars and in the expensive range. Sentence19: Is there anything else that I can help you with? Sentence20: I want it to leave after 18:30. Sentence21: On Friday there are a train leaving at 5:40 and the cost is 75.10 pounds. The trains depart every hour, so you can chose your time. The last train depart at 9:40. Sentence22: I apologize, the hotel booking was unsuccesful. Would you like to try another day? Sentence23: Yes a booking for 8 people for 3 nights starting on Tuesday. Sentence24: You are in luck for 1 night at Allenbell. The reference number is PYGL9EVW . You would like a train? Question: Who has spoken the sentence 19? (A) User (B) System
Output: 


Answer: (B) System