You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Jeffery Martinez here. Can you please check for the flights on the route from Austin to Oakland?

ASSISTANT: Sure, may I know your nearest preferable airport codes of Austin and Oakland?

USER: My source airport code is AUS and my destination airport code is OAK.

ASSISTANT: May I know your travelling dates?

USER: My journey dates will be on Aug 17th and Aug 19th.

ASSISTANT: Please allow me a moment.

USER: I need a flight which will depart in the evening.

ASSISTANT: I have checked and there is no flight found on your journey dates to book the ticket on your journey dates.

USER: Ok, thank you for checking. Thank you for assisting me. Thank you.