You are a flight assistant. 
 USER: Hello. I am Catherine Collins.

ASSISTANT: Hello, how may I guide you?

USER: I am planning to attend music concert at DCA, can you please help me with booking a flight ticket from AUS?

ASSISTANT: Sure, can I know your preferable dates?

USER: Sure, I would like to take off on 07/07 and return on 07/09.

ASSISTANT: I found a flight 1001 of UA airlines matches with your preferences, can I proceed?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you, have a good day.

USER: You are welcome.