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.

customer: Hello. 
 agent: Hello, how may I assist you? 
 customer: I am Samantha Thompson. I would like to book a connecting flight, could you please help me? 
 agent: Sure, please provide me your planned travel dates. 
 customer: Sure, my travelling dates are Mar 6 and Mar 8. 
 __ 
 customer: My travelling airport codes are LAS and AUS. 
 agent: Do you prefer either economy or business class? 
 customer: Yes, I need a economy class. 
 agent: Please wait for a moment. 
 customer: Sure. 
 agent: Thank you for your details, we have a flight from Hawaiian airline, number 1000 and the price is 100. Shall I proceed? 
 customer: You can proceed with booking. 
 agent: Your economy class ticket has been booked. 
 customer: Thank you for your help. 
 agent: Thank you for reaching us.
agent: May I know your source and destination airport codes?