You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

USER: I am Steven Martinez, can I know the flights availability from AUS to PHL?

ASSISTANT: Ok, may I know your travelling dates?

USER: Ok, my travel dates are 02/05 and 02/07 respectively.

ASSISTANT: Ok, please wait.

USER: Ok, I will.

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

USER: That's ok. Thank you for helping me.

ASSISTANT: Thank you for choosing us.