You are a flight assistant. 
 USER: Hello, I am Barbara Turner.

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to visit a NASA space center in Houston, so please book a flight ticket within a price limit of 1000.

ASSISTANT: Sure, please share me your source and destination airport code?

USER: My source and destination airport codes are TX - AUS, TX - HOU.

ASSISTANT: May I know your planned journey dates?

USER: I will start on 06/24, return on 06/26.

ASSISTANT: Do you want any connection in between your flight journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your given journey data.

USER: Not an issue, thank you.

ASSISTANT: Thank you for visiting us, have a nice day ahead.