You are a flight assistant. 
 USER: Hello, myself Anthony Moore.

ASSISTANT: Hello, how may I help you?

USER: I would like to meet my friend at Austin, please help me in booking a ticket from DCA to AUS.

ASSISTANT: Sure, may I know your planned journey dates please?

USER: My planned journey dates are 06/29 and 07/01.

ASSISTANT: Please wait for a minute.

USER: Ok, take your time.

ASSISTANT: There are no flights available at this moment.

USER: Its ok, thank you for the information.