Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Input: Sentence1: I'm looking for a Lebanese restaurant that is expensive in price. Sentence2: Thanks, I also need a train from cambridge to peterborough afterwards Sentence3: Yes I was able to make that reservation at 15:45 your reference number XH49SBME . Sentence4: There are 16 trains leaving on Thursday after your dinner. I would think 2 hours should be long enough? So there is one at 18:06 I can recommend. Sentence5: I have the Ali Baba restaurant in the centre of town. They are moderately priced. Can I help you in reserving a table? Sentence6: I'd like my train to arrive by 16:45, please. Sentence7: Is there an opening available at 15:45? I'll also need the reservation number if it's available. Sentence8: The booking was unsuccessful, would you like to try another time? Sentence9: You are welcome. Thank you for contacting the Cambridge TownInfo centre. Good bye. Sentence10: I am very sorry there are no results for an expensive lebanese restaurant. Would you like to try for a different type of cuisine? Sentence11: Really? The Ali Baba is Lebanese? Sentence12: Yes I would like to book a table for 7 people at 16:45 on thursday. Sentence13: Yes, that sounds like it will work for me. Thank you for the information. That should be all I need today. Sentence14: No I'd really like lebanese, is there one in the centre area? Sentence15: Yes. The ali baba is lebanese. Would you like to book a table? Sentence16: I have train TR4814 that will be departing at 15:34 and will get you there by 16:24. Would that be something that interests you? Question: Who has spoken the sentence 3? (A) User (B) System
Output:
Answer: (B) System