Instructions: In this task, you're given a dialogue between a customer and a flight booking agent with a gap in the conversation. Your job is to find the answer of the previous dialogue. Avoid using irrelevant extra information while creating the answer. The answer should be relevant to the question before the blank. If you fill the blank with a question, it should have an answer from the agent in the given dialogue. Fill the gap marked with underline.
Input: customer: Hello, Alexander Evans here. 
 agent: Hello, how may I help you? 
 customer: I would like to visit botanical gardens at Denver, can you help me in booking a ticket from SEA to DEN? 
 agent: Can I have your planned dates please? 
 customer: My preferred journey dates are 11/03 and 11/05. 
 agent: I found a flight for you in UA airlines with price 100. Can I book your ticket? 
 __ 
 agent: Ok, your ticket has been booked with flight number 1000. 
 customer: Thank you for your service. 
 agent: Thank you for choosing us.
Output:
customer: Please book the ticket.