Q: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Sentence1: Great. Thank you for your help! Sentence2: Hi, I'm looking for a train from Cambridge that arrives by 17:45. Sentence3: TR5154 LEAVES AT 05: 59 SHOULD I BOOK IT FOR YOU? Sentence4: Going to london liverpool street from cambridge. I need to arrive by 17:45. Sentence5: Is there anything else I can help you with? Sentence6: I would like to arrive by 17:45 Sentence7: What do and time and do want to leave? Sentence8: How long is the trip on the TR5154? Sentence9: Each train on that route makes the run in 88 minutes. Sentence10: That is all I need. Sentence11: Great! Should you need anything else, please let us know. Sentence12: Where will you be going? Sentence13: Sure, there's club salsa in the centre, their phone number is 07782218745 and the entrance fee is 5 pounds. Sentence14: Excellent. I need to a nightclub in the centre as well. Question: Who has spoken the sentence 10? (A) User (B) System
A:
Answer: (A) User