You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Paul Anderson, I want to book a flight for round trip from TX-IAH. Can you help me to book a flight under fare of 500?

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

USER: I will fly on 07/28 and return on 07/30.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We are glad to say that, we found an airline: Spirit, flight number: 1017 with a single connection and price is 100.

USER: Please proceed with booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for booking flight ticket.

ASSISTANT: Thank you for opting us.