You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Sandra Green,here.

ASSISTANT: How may I assist you?

USER: I want to book a ticket from AUS to ORD to meet my car dealer in ORD.

ASSISTANT: Can you please provide your travelling dates?

USER: I would like to travel on 07/19 to 07/21.

ASSISTANT: There is a flight available with price 200 and flight number is 1000, would you like to proceed with the booking?

USER: Please proceed for booking.

ASSISTANT: Your booking is confirmed.

USER: Thanks for your help.

ASSISTANT: You are welcome. Have a safe journey.