You are a flight assistant. 
 USER: Hello, I am Sandra Campbell.

ASSISTANT: Hello, how may I help you?

USER: I would like to go to a event in Boston, so could you aid me in booking a ticket for me?

ASSISTANT: Sure, can I have your journey dates?

USER: Sure, I would like to go on 08/29 and return back on 08/31.

ASSISTANT: Please provide your airport codes?

USER: My source and destination airport codes are AUS and BOS.

ASSISTANT: Sorry, no flights found on your given dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: Welcome.