You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Rebecca Hernandez. I am looking for booking a ticket to DFW, going to give a presentation of my story to a publisher at Fortworth, can you please book a ticket?

ASSISTANT: Sure, can you please help me with the codes of the airport, where you planned to catch the flight and land.

USER: My source airport code is HOU.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My planning dates are from 02/23 to 02/25.

ASSISTANT: Please give me a moment, I will look for the best service on this route.

USER: Sure.

ASSISTANT: There is a flight available with Southwest airlines providing the service on this route according to your given dates, shall I proceed your booking with this flight?

USER: Please book the ticket.

ASSISTANT: Your booking is confirmed, flight number is 1020.

USER: Thank you for your help.

ASSISTANT: You are welcome. Have a safe journey.