You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: My name is Steven Mitchell. I want to visit NASA space center in Houston, so please book a flight ticket with a price limit of 500.

ASSISTANT: Sure, may I know your travelling dates?

USER: My departure day is 05/12, return day is 05/14.

ASSISTANT: Can you please provide me your source and destination codes?

USER: My source and destination airport codes are AZ-PHX, TX-IAH.

ASSISTANT: Please wait for a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, we found an airline: JetBlue, flight number: 1006 with a single connection and price is 100. Shall I proceed to booking?

USER: You can proceed with this airline.

ASSISTANT: Your flight ticket has been confirmed with your name.

USER: Thanks for booking a flight ticket.

ASSISTANT: Thanks for opting us. Have a safe journey.