You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to meet my mother-in-law at Philadelphia, could you book my flight ticket?

ASSISTANT: Sure, I will help you. Can you please tell me your trip dates?

USER: My travel dates are 02/10 and 02/12.

ASSISTANT: Ok, may I know your airport codes?

USER: My origin and destination airport codes are AUS and PHL.

ASSISTANT: Ok, could I have your name please?

USER: Donna Carter here.

ASSISTANT: Sorry, all flights are busy on your requested travelling dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for connecting with us, have a great day.