You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Michelle Edwards, would like to attend a marriage at DCA, so can you help me to book a flight from AUS?

ASSISTANT: Sure, can I know the travel dates please?

USER: My trip starts from 09/19 to 09/21.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: There is a flight in Spirit airline with price 100, can I book it?

USER: Book that flight.

ASSISTANT: Your ticket has been booked with flight number 1004.

USER: Thank you.

ASSISTANT: Thank you for approaching us.