You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I need to go Austin urgently,  can you please book a direct flight?

ASSISTANT: Sure, let me know your trip dates?

USER: Sure, my departure and return travel dates are 2nd and 4th of April.

ASSISTANT: Please share your airport codes?

USER: Well, my respective source and destination airport codes are PHL and AUS.

ASSISTANT: May I know your connection limit?

USER: I have already mentioned it above.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have.

ASSISTANT: Can you please share your name?

USER: My name is Samuel King.

ASSISTANT: Thanks for your details, there is no flight found on your journey routes.

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

ASSISTANT: Thank you for opting us.