You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to travel from HOU to AUS. Can you help me to book a flight ticket?

ASSISTANT: May I know your desired travel dates please?

USER: I want to travel in the flight on July 28 and July 30.

ASSISTANT: Do you have any specifications?

USER: I want to depart in evening time.

ASSISTANT: May I know your name please?

USER: David Moore.

ASSISTANT: There is a flight with connection limit 1 and fare 200, shall I proceed for booking?

USER: Proceed to booking.

ASSISTANT: Your ticket is booked, flight number 1021 with Spirit Airlines.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.