You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me to book a flight ticket from AUS to IAD?

ASSISTANT: Sure, may I know the planned travel dates?

USER: My journey dates are July 7 to July 9.

ASSISTANT: Please provide me the specifications.

USER: I need a single connection of flight. I want to return in the afternoon.

ASSISTANT: May I know the name to reserve the ticket?

USER: Larry Thompson here.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.