You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is William Anderson. I would like to travel from CLT to PHX, could you help me out?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My preferable dates are from 02/15 to 02/17.

ASSISTANT: There is a flight available on your requested dates from Spirit airlines with a fare of 100.

USER: Please proceed with the booking.

ASSISTANT: Shall I confirm your booking? Your ticket is booked with flight 1019.

USER: Thank you.

ASSISTANT: You are welcome.