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 using our service today. Sentence2: That gives you two options. Both are guesthouses. Both offer free parking and free wifi. The Alexander B&B is 4 star rated. The El Shaddai has a 0 rating. Sentence3: I would like a taxi from the hotel to the restaurant. I would like to arrive by 14:45. I would like the contact number and car type. Sentence4: We have lots of those! Is there a particular type of food you'd like? Sentence5: Booking was successful. The table will be reserved for 15 minutes. Reference number is : IBTN1DDC . Sentence6: Okay for how many nights and how many people? Sentence7: What is the price of the Alexander? Sentence8: ok, i need to book it for the same day. Sentence9: Yes for 3 at 14:45 wednesday, can I get the reference number too please Sentence10: I recommend La Raza - fantastic (and cheap!) Spanish cuisine. I'd be happy to book a table for you, if you like. Sentence11: You have a wonderful day as well and again, thank you! Sentence12: Okay. Your booking was successful. The car type is blue Lexus. The contact number is 07881581074. Sentence13: not really but i need it for 3 people Sentence14: You are all booked for the alexander bed and breakfast! Your reference number is 66XCD1XW . Is there anything else you need? Sentence15: Okay thank you,that's all I need for now. Sentence16: 3 nights, 3 people, please. Sentence17: Have a wonderful day. Sentence18: You're very welcome! Bye! Sentence19: Thank you so much. Sentence20: It is a cheap place. Sentence21: Hello, I am looking for a cheap place to dine in the centre. Sentence22: Thanks. I also need a cheap place to stay in the center. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User