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. Please do not hestitate to call if require further assistance. Sentence2: I would like a hotel in the north please. Sentence3: Which one has nights available from Thursday to Tuesday? Sentence4: Sure, we have 2 hotels in the north, ashley hotel and lovell lodge. Would you like to book one? Sentence5: Your booking is successful. The total fee is 23.6 GBP and your booking reference number is DOS0ARZU . Sentence6: There's a train on Friday leaving at 17:00. Should I book it? Sentence7: There are 28 trains meeting that criteria. What day are you wanting to leave? Sentence8: I am looking for a 2 star hotel with free wifi. Sentence9: Looks like you are all set. Goodbye! Sentence10: There aren't any that match your criteria in the centre. Any other suggestions? Sentence11: I am looking for a hotel near the city center moderately priced. Sentence12: I'm not sure. I will need to attempt a booking to give you that information. Which would you like to book? Sentence13: Thank you! I also need a train from cambridge to london kings cross. I need to depart after 16:00. Sentence14: There are three hotel types available. Do you want a specific area or price range? Sentence15: You're all set! Your reference number is JUZ789Y1 . How else may I help you? Sentence16: Please book the Ashley hotel for 1 person for 5 nights starting on Thursday Sentence17: I need a train for 1 from Cambridge leaving after 16:00 heading to London Kings Cross. Can you find any trains for that time and send me a reference number? Sentence18: Yes, please. Just the one ticket. Sentence19: Is there a specific day that you want to travel? What time do you want to arrive by? Sentence20: Tuesday and I would like to leave after 16:00. Question: Who has spoken the sentence 18? (A) User (B) System
Output: 


Answer: (A) User