You are a flight assistant. 
 USER: Hello, I am Matthew Baker.

ASSISTANT: Hello, How can I help you the day?

USER: Please book me a ticket with price under 500.

ASSISTANT: Sure, Can I know your planned travel dates?

USER: I want to start on 09/20 and return on 09/22 as I have an appointment with my family doctor on 09/21.

ASSISTANT: Is there any connection limit?

USER: Yes, I need a break.

ASSISTANT: From where would you like to start your journey?

USER: I would like to start from TX - AUS and reach CA - SFO.

ASSISTANT: Thanks for the details, Please stand by.

USER: Ok.

ASSISTANT: We found a 1024 Delta airline, matching your needs.

USER: Ok, please book my ticket.

ASSISTANT: The airfare is 100, with single halt. Shall I reserve?

USER: Yes please.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your support.

ASSISTANT: Thanks for reaching us.