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: Thank you for all your help! Sentence2: Do you need to arrive by a certain time? Sentence3: Thank you. Bye. Sentence4: I'm wondering if there are any boat attractions in town? Sentence5: I would recommend the riverboat georgina. The phone number is 01223902091 and the postcode is cb43ax. Do you need anything else? Sentence6: I booked you for 6 tickets on the 15:50 train that arrives in Ely at 16:07. your reference number for the journey is 3QK3PKJT . Sentence7: What are your departure and arrival stations, and what time of day would you like to travel? Sentence8: No as long as it leaves any time after 13:00 for 6 please and I need the reference number Sentence9: Yes, I'm also looking for a train for Tuesday. Sentence10: Could you please retstate when you would like to leave and arrive by? Sentence11: I am glad I could help. Have a good day and a fun trip! Sentence12: I am leaving from Ely and departing at 5. Sentence13: I have a number of trains available, what is your place of departure and your destination, please? Sentence14: I would like to leave by 17:00 Sentence15: There are 4 boat attractions in town. What part of town would you prefer? Sentence16: Thank you for contacting Cambridge TownInfo Centre. Have a great day! Sentence17: I'm so sorry. I need to leave Cambridge after 13:00 on Tuesday and I'm going to Ely. I need 6 tickets. Sentence18: It doesn't matter what area, I just need a phone number and postcode for one please. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User