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: do i book only one ticket Sentence2: Yes, please confirm how many tickets you would like me to book, just the one? Sentence3: Yes at 11 am , can you bnook the the one close to that time Sentence4: Okay, well I also need a train departing for Cambridge on Wednesday. Sentence5: I am looking specifically for Saint John's College. Sentence6: How about the 11:59 that will arrive by 13:27? It is 16.60 pounds. Sentence7: I need just a little more information to help. I think all places in Cambridge are special, and I would like to be able to narrow it down for you. Sentence8: That's all I needed. Sentence9: No, please book for 8 people and can I get the booking reference number? Sentence10: Booking was successful, the total fee is 132.8 GBP payable at the station . Reference number is : 98NW4G1V . Anything else? Sentence11: I'm looking for a special place, can you help? Sentence12: I have several trains headed to Cambridge on Wednesday. Where will you be departing from? Sentence13: There are 10 trains running that route on Wednesday. Do you have a particular departure time in mind? Sentence14: sorry i dont have that in our list. is there something else i can do for you? Sentence15: The train will be leaving Cambridge and going to London Liverpool Street. Sentence16: That will work can you book that for me. Sentence17: Wonderful, have a great day! Sentence18: Can you book it for me and get a reference number ? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User