You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Margaret Martinez.

ASSISTANT: How may I render you today?

USER: I would like to book a ticket from AUS to DCA, can you help me?

ASSISTANT: Sure, When you are willing to travel?

USER: My travel dates are 03/05 and 03/07.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, there are no flights found with your travelling dates.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us, have a good day.