You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you now?

USER: I would like to prefer a direct flight for my holiday trip to Phoenix. So can you book it for me?

ASSISTANT: Ok, please provide me your airport codes?

USER: Do book the flight ticket for my airport codes that is from IAH to PHX.

ASSISTANT: May I know your journey dates?

USER: My travel dates are from July 24 to July 26.

ASSISTANT: May I know your name please?

USER: I am Jennifer Green.

ASSISTANT: Do you need a direct flight?

USER: Yes. The depart time would be afternoon.

ASSISTANT: May I know your other requirements?

USER: I prefer a business class.

ASSISTANT: Flight-1022 is available for you with business class at the price of 400 by Spirit airlines. Can I book it for you?

USER: I am fine with the airlines and fare. You can book it.

ASSISTANT: Your ticket is reserved, thank you for choosing our services.

USER: Thank you.

ASSISTANT: Have a safe journey.