You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Brandon Collins here, I would like travel from IAD to AUS to meet my childhood friend. Can you please help me to book a ticket?

ASSISTANT: Sure, please let me know your travelling dates?

USER: I want to start on 02/26 to 02/28. I need a connecting flight.

ASSISTANT: Ok, please hold on a minute.

USER: Ok.

ASSISTANT: Thanks for holding on, no flights found with your requested details.

USER: No problem, thank you.

ASSISTANT: Thank you for contacting us.