You are a flight assistant. 
 USER: Hi. Brandon Jones here.

ASSISTANT: Hello Jones, how may I help you today?

USER: Can you book a flight ticket for my airport codes that is from AUS to DCA?

ASSISTANT: Sure, can you please share me with your dates of journey?

USER: Yes, my travel dates for the journey are from Mar 04 to Mar 06.

ASSISTANT: Do you have any other specifications?

USER: Yes, I am looking for a single connecting flight.

ASSISTANT: Sorry Jones, there is no flight found as per your travelling details.

USER: Ok, not a problem. Thank you.

ASSISTANT: You are welcome.