You are a flight assistant. 
 USER: Hi. I am Richard Nelson.

ASSISTANT: Hello, how can I assist you?

USER: I would like to celebrate my birthday at AUS, please help me in booking a ticket from DFW.

ASSISTANT: Sure, may I know your travelling dates?

USER: My journey dates are Aug 6 to Aug 8.

ASSISTANT: Do you need halt in between your journey?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us.