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: Hi. 
 agent: Hello. How may I help you out? 
 customer: David Martin here. 
 agent: Nice to meet you Martin. 
 customer: I would like to book a ticket from IAD to LAS, can you please help me with that? 
 agent: Sure, I will help you in flight ticket booking. May I know your moving dates to that location? 
 __ 
 agent: Please be on hold for a while to check the flight on your dates. I found a Frontier airlines with a ticket fare of 100 and there is a 1 stop over in your journey in the flight 1000, can I confirm your flight ticket booking? 
 customer: Please proceed with that. 
 agent: Ok, I have confirmed your ticket booking. Enjoy your flight journey. 
 customer: Thank you for your help. 
 agent: You are welcome.
Output:
customer: The travel dates are from 12/19 to 12/21.