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: The TR8510 leaves at 07:35 and arrives by 07:52. Would you like me to book tickets? Sentence2: i am glad i have been of help. good day Sentence3: let's change location and the restaurant should be in the expensive price range. Sentence4: I am traveling to Cambridge and looking forward to try local restaurants. Sentence5: that type of food is not served in the west. can we change location? Sentence6: Can you see if there are any expensive european food? Sentence7: Great! Cambridge has many restaurants! Is there a certain type of food you'd like or a certain price range? Sentence8: I am also looking for a restaurant in the West and really want to have Brazilian food. Sentence9: I think that should be it for today! Thank you so much for your help, you've been very kind! Sentence10: Booking was successful! Your reference number is : JQ9093PX . Sentence11: have a great day and thanks for staying with us Sentence12: Okay, your booking was successful. Your reference number is EVDO33LE . 22 GBP is your total and it's payable at the station. Sentence13: Yes, please. I will need 5 tickets. Sentence14: Yes please, 5 people on friday at 13:30 Sentence15: Cambridge Lodge Restaurant will fit your needs. Would you like for me to book a table? Sentence16: Have a great day. Sentence17: Maybe I should figure out my train first. I am departing from Ely on Friday and want to get to Cambridge by 9:30. Sentence18: It looks like there aren't any expensive Brazilian places in the city. Would you like me to check a different price range? Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System