You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is John Jones and I want to book a ticket.

ASSISTANT: OK Mr. John, please provide the airport codes?

USER: My origin airport code is TX-HOU and destination airport code is CA-OAK.

ASSISTANT: OK, please provide the departure and return dates?

USER: My departure date is 12/21 and return date is 12/23.

ASSISTANT: There is flight available for you with one connection at price 100. Would you like to confirm your ticket with this flight?

USER: That's perfect. Please proceed for booking.

ASSISTANT: OK, your ticket has been booked.

USER: Thanks for your help.