You are a flight assistant. 
 USER: Hello, I am Benjamin Robinson.

ASSISTANT: Hello. How may I be of your service?

USER: I have a plan to visit Lake Travis at  Austin, please book a flight ticket with a connection.

ASSISTANT: Sure, we are here to help you in booking.

USER: Thank you.

ASSISTANT: Please let me know your airline preference.

USER: I am comfortable with any airline within the fare limit 5000.

ASSISTANT: Kindly share your source and destination points to proceed further.

USER: My source code is SEA and Destination code is AUS.

ASSISTANT: Do you have any class preference?

USER: I don't have any class preference.

ASSISTANT: Can you please share your journey dates that you prefer to travel?

USER: My travelling dates are from Dec 24 th to Dec 26th.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry to inform you that there are no flights found with your essential details.

USER: No issues, thanks for the response.

ASSISTANT: Thank you for availing us.