You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to book a ticket from PHL to AUS. For meeting my parents.

ASSISTANT: Can you please help me with your travelling dates?

USER: My travel dates are 08/21 to 08/23.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Sure.

ASSISTANT: May I know your name to proceed further?

USER: David Smith.

ASSISTANT: David, there is a flight available at your request with price 100. Would you like me to proceed the booking?

USER: Yes, please.

ASSISTANT: Sure. Your booking is confirmed.Your flight number is 1000 with Spirit airline.

USER: Thanks for your help.

ASSISTANT: You are welcome.