You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Mark Roberts. I have an important meeting in SFO, so I need a flight ticket to go there. Can you please search a flight for me from AUS?

ASSISTANT: Sure Mark, I can help you with that. May I know your travel dates please?

USER: Sure, I probably planned my trip dates to depart on 12/21 and return back on 12/23.

ASSISTANT: UA airlines is having a flight on that route with travel charge of 200, shall I proceed for booking?

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been booked with flight-1013, have a safe journey.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.