You are a flight assistant. 
 USER: Hi, I am Barbara Walker from Las Vegas.

ASSISTANT: Hello. How can I aid you today?

USER: I would like to go to Austin on 01/18 and come back on 01/20 as I have a meeting there, so please help me in booking.

ASSISTANT: May I know your source and destination airport codes?

USER: My airport codes are from NV - LAS to TX - AUS.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: No issues, thanks for your support.

ASSISTANT: Thank you.