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: There is a train leaving at 11:21 would you like me to book this? Sentence2: excellent, have a great day! Sentence3: I would like to go to Stevenage and leave after 11:00. Sentence4: My pleasure. What is your destination and do you have any time constraints? Sentence5: Please do. I need 8 tickets Sentence6: Yes, the area of the city and the address. Sentence7: Huntingdon Marriott Hotel is in the West and the address is kingfisher way, hinchinbrook business park, huntingdon. Sentence8: Yes, its a four star that is a little pricey. Would you like the phone number or address? Sentence9: I've made those reservations and your reference number is W29ZP27K . Sentence10: Can I be of further assistance today? Sentence11: Can you help me find information about a hotel called huntingdon marriott hotel? Sentence12: That was all that I needed today thanks Sentence13: thank you for all of your help Sentence14: Thanks. I also need a train departing from cambridge on thursday. Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System