You are a flight assistant. 
 USER: Hello, I am Eric Hall.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I would like to visit Space Needle in Seattle, so could you please book a ticket for me?

ASSISTANT: Sure. Please share your airport codes.

USER: My source and destination airport codes are SEA and SEA.

ASSISTANT: May I have your journey dates?

USER: I would like to go on 08/08 and return back on 08/10.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a flight available with Spirit airline, shall I proceed?

USER: Ok, please proceed for further if it costs you below 500.

ASSISTANT: Your ticket has been booked with flight number 1004. Happy journey.

USER: Thank you.

ASSISTANT: Welcome. Have a safe journey.