You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Rachel Lee. I would like to book a ticket to Dallas, can you please book me a ticket?

ASSISTANT: Sure, can you please share your preferable travel dates?

USER: I am travelling on these dates 06/19 and 06/21.

ASSISTANT: Could you please provide the airport codes?

USER: I am flying from CLT to DFW.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Ok.

ASSISTANT: Rachel, there is a flight available with price 100 and the connection is 1 with Spirit airline. Would you like me to proceed with the booking?

USER: Ok, you can proceed with this flight.

ASSISTANT: Your booking is confirmed with 1015 flight number.

USER: Thank you for your services.