You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me with booking a flight ticket from AUS to PHL?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are July 19 and 21.

ASSISTANT: Do you need connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Sandra Green.

ASSISTANT: There is a flight of United airline, flight number 1020 with the fare of 100. Can I proceed?

USER: You can proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.