Detailed 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.
Problem:customer: Hello. 
 agent: Hello. How can I help you? 
 customer: My name is Gary Jones. I want to attend my sister's marriage in Phoenix, could you please help me in booking a flight ticket? 
 agent: I'm glad to help you. Please provide me your airport codes. 
 customer: It's from SEA to PHX. 
 agent: May I know your travel dates? 
 customer: The dates are from 09/13 to 09/15. 
 agent: Please wait a minute. 
 customer: Ok. 
 agent: There is a flight available with price 200 from Frontier airlines. Would you like to proceed with this flight? 
 customer: That's perfect. Please book the ticket. 
 __ 
 customer: Thank you for your help. 
 agent: Thank you for choosing our services.
Solution:
agent: Your ticket has been booked.