You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Rebecca Robinson here.

ASSISTANT: How can I help you?

USER: I have a photo shoot at Austin, can you please book me a ticket?

ASSISTANT: Sure Rebecca, can I know the travel dates please?

USER: My departure date is 02/20 and return date is 02/22.

ASSISTANT: Could you provide the airport codes please?

USER: Sure, my source and destination airport codes are OAK and AUS.

ASSISTANT: Ok. There is a flight in UA airline with price 100, can I book it?

USER: That's ok, please proceed booking.

ASSISTANT: Your ticket has been booked with flight number 1003.

USER: Thank you for booking.

ASSISTANT: You are welcome.