You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Sharon Hernandez. I want to book a flight ticket from DCA to AUS. Could you help me in booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from Aug 04-06.

ASSISTANT: Is there any particular timings in your departure and arrival?

USER: My return time should be in the afternoon.

ASSISTANT: Do you need any specifications for this reservation?

USER: I need 1 connecting flight.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching our service.